diff --git a/Chart.yaml b/Chart.yaml
index 2adff4ca1..5f81b6abf 100644
--- a/Chart.yaml
+++ b/Chart.yaml
@@ -1 +1 @@
-v5.0.2
+v5.0.3
diff --git a/public/index.html b/public/index.html
index 6e3141509..e2ace57ba 100644
--- a/public/index.html
+++ b/public/index.html
@@ -14,7 +14,7 @@
     <script>
         (function (w, a, y, f) {
             var openAthensId = '5614d0c5-9fbf-46a0-8311-baf34df79bdb';
-            if (window.location.href.includes('.www.')) openAthensId = '57227ab3-80a2-4bbe-a367-04fe13abbddd'
+            if (window.location.href.includes('.old.')) openAthensId = '57227ab3-80a2-4bbe-a367-04fe13abbddd'
             else if (window.location.href.includes('.uat.')) openAthensId = '685d4935-3c71-4716-afdd-9fb92d218ac6'
             else if (window.location.href.includes('.uatbeta.')) openAthensId = '5b5b4f69-c4a4-472f-92fe-e60678da6b04'
             else if (window.location.href.includes('.latest.')) openAthensId = '9e3ed49e-7566-4d2c-925e-6a6a86555d79'
@@ -40,7 +40,7 @@
             // Disable tracking if the opt-out cookie exists.
             window.gaConsent = !(document.cookie.indexOf('ga-disable-UA-166025838-1=true') > -1);
             
-            if (window.location.href.includes('.www.')) { 
+            if (window.location.href.includes('.old.')) { 
                 window.gtmId = 'GTM-NL9B25X';
             }
         })();
diff --git a/src/cms/GatewayAdvancedSearchBanner/__snapshots__/GatewayAdvancedSearchBanner.test.jsx.snap b/src/cms/GatewayAdvancedSearchBanner/__snapshots__/GatewayAdvancedSearchBanner.test.jsx.snap
index 132e8da77..c968e9b57 100644
--- a/src/cms/GatewayAdvancedSearchBanner/__snapshots__/GatewayAdvancedSearchBanner.test.jsx.snap
+++ b/src/cms/GatewayAdvancedSearchBanner/__snapshots__/GatewayAdvancedSearchBanner.test.jsx.snap
@@ -82,7 +82,7 @@ exports[`Given the GatewayAdvancedSearchBanner component When it is rendered The
               >
                 <img
                   alt="search.advanced.dataUtilityWizard.mediaAlt"
-                  src="https://web.www.healthdatagateway.org/"
+                  src="https://web.old.healthdatagateway.org/"
                 />
               </div>
             </div>
@@ -162,7 +162,7 @@ exports[`Given the GatewayAdvancedSearchBanner component When it is rendered The
               >
                 <img
                   alt="Cohort Discovery feature image"
-                  src="https://web.www.healthdatagateway.org/"
+                  src="https://web.old.healthdatagateway.org/"
                 />
               </div>
             </div>
diff --git a/src/cms/GatewayAdvancedSearchCohortDiscovery/GatewayAdvancedSearchCohortDiscovery.test.jsx b/src/cms/GatewayAdvancedSearchCohortDiscovery/GatewayAdvancedSearchCohortDiscovery.test.jsx
index 79b9070ff..85c66312b 100644
--- a/src/cms/GatewayAdvancedSearchCohortDiscovery/GatewayAdvancedSearchCohortDiscovery.test.jsx
+++ b/src/cms/GatewayAdvancedSearchCohortDiscovery/GatewayAdvancedSearchCohortDiscovery.test.jsx
@@ -67,7 +67,7 @@ describe('Given the GatewayAdvancedSearchDataUtilityWizard component', () => {
                 });
 
                 it('Then goes to the web subdomain', async () => {
-                    expect(window.location.assign).toHaveBeenCalledWith('https://web.www.healthdatagateway.org/search=&tab=datasets');
+                    expect(window.location.assign).toHaveBeenCalledWith('https://web.old.healthdatagateway.org/search=&tab=datasets');
                 });
             });
         });
@@ -101,7 +101,7 @@ describe('Given the GatewayAdvancedSearchDataUtilityWizard component', () => {
                 });
 
                 it('Then goes to the web subdomain', async () => {
-                    expect(window.location.assign).toHaveBeenCalledWith('https://web.www.healthdatagateway.org/search=&tab=datasets');
+                    expect(window.location.assign).toHaveBeenCalledWith('https://web.old.healthdatagateway.org/search=&tab=datasets');
                 });
             });
         });
diff --git a/src/cms/GatewayAdvancedSearchCohortDiscovery/__snapshots__/GatewayAdvancedSearchCohortDiscovery.test.jsx.snap b/src/cms/GatewayAdvancedSearchCohortDiscovery/__snapshots__/GatewayAdvancedSearchCohortDiscovery.test.jsx.snap
index aa07aca13..59421aa4a 100644
--- a/src/cms/GatewayAdvancedSearchCohortDiscovery/__snapshots__/GatewayAdvancedSearchCohortDiscovery.test.jsx.snap
+++ b/src/cms/GatewayAdvancedSearchCohortDiscovery/__snapshots__/GatewayAdvancedSearchCohortDiscovery.test.jsx.snap
@@ -71,7 +71,7 @@ exports[`Given the GatewayAdvancedSearchDataUtilityWizard component When it is r
           >
             <img
               alt="Cohort Discovery feature image"
-              src="https://web.www.healthdatagateway.org/"
+              src="https://web.old.healthdatagateway.org/"
             />
           </div>
         </div>
diff --git a/src/cms/GatewayAdvancedSearchDataUtilityWizard/GatewayAdvancedSearchDataUtilityWizard.test.jsx b/src/cms/GatewayAdvancedSearchDataUtilityWizard/GatewayAdvancedSearchDataUtilityWizard.test.jsx
index 31f14eefe..6dce58935 100644
--- a/src/cms/GatewayAdvancedSearchDataUtilityWizard/GatewayAdvancedSearchDataUtilityWizard.test.jsx
+++ b/src/cms/GatewayAdvancedSearchDataUtilityWizard/GatewayAdvancedSearchDataUtilityWizard.test.jsx
@@ -38,7 +38,7 @@ describe('Given the GatewayAdvancedSearchDataUtilityWizard component', () => {
             });
 
             it('Then goes to the web subdomain', async () => {
-                expect(window.location.assign).toHaveBeenCalledWith('https://web.www.healthdatagateway.org/search?search=&tab=Datasets');
+                expect(window.location.assign).toHaveBeenCalledWith('https://web.old.healthdatagateway.org/search?search=&tab=Datasets');
             });
         });
     });
diff --git a/src/cms/GatewayAdvancedSearchDataUtilityWizard/__snapshots__/GatewayAdvancedSearchDataUtilityWizard.test.jsx.snap b/src/cms/GatewayAdvancedSearchDataUtilityWizard/__snapshots__/GatewayAdvancedSearchDataUtilityWizard.test.jsx.snap
index cffd315ec..646dcde0d 100644
--- a/src/cms/GatewayAdvancedSearchDataUtilityWizard/__snapshots__/GatewayAdvancedSearchDataUtilityWizard.test.jsx.snap
+++ b/src/cms/GatewayAdvancedSearchDataUtilityWizard/__snapshots__/GatewayAdvancedSearchDataUtilityWizard.test.jsx.snap
@@ -71,7 +71,7 @@ exports[`Given the GatewayAdvancedSearchDataUtilityWizard component When it is r
           >
             <img
               alt="search.advanced.dataUtilityWizard.mediaAlt"
-              src="https://web.www.healthdatagateway.org/"
+              src="https://web.old.healthdatagateway.org/"
             />
           </div>
         </div>
diff --git a/src/configs/url.config.js b/src/configs/url.config.js
index 5e21a1ef8..04f0f8342 100644
--- a/src/configs/url.config.js
+++ b/src/configs/url.config.js
@@ -49,7 +49,7 @@ const _buildUrl = urlType => {
 export const getWidgetAPI = () => {
     const { href } = window.location;
     let widgetAPIURL = 'https://dev-datause-widget.dev.hdruk.dev';
-    if (href.includes('.www.')) {
+    if (href.includes('.old.')) {
         widgetAPIURL = 'https://datause-widget.healthdatagateway.org';
     }
     if (href.includes('.uat.')) {
@@ -66,7 +66,7 @@ export const getWidgetAPI = () => {
 
 export const addCmsGatewayApiHostname = path => {
     const { hostname } = window.location;
-    let webHostname = 'https://api.www.healthdatagateway.org';
+    let webHostname = 'https://api.old.healthdatagateway.org';
 
     if (hostname.includes('uat2.')) {
         webHostname = 'https://api.uat2.healthdatagateway.org';
@@ -87,7 +87,7 @@ export const addCmsGatewayApiHostname = path => {
 
 export const addCmsGatewayHostname = path => {
     const { hostname } = window.location;
-    let webHostname = 'https://web.www.healthdatagateway.org';
+    let webHostname = 'https://web.old.healthdatagateway.org';
 
     if (hostname.includes('uat2.')) {
         webHostname = 'https://web.uat2.healthdatagateway.org';
diff --git a/src/configs/url.config.test.js b/src/configs/url.config.test.js
index 09742012d..e872423f4 100644
--- a/src/configs/url.config.test.js
+++ b/src/configs/url.config.test.js
@@ -32,7 +32,7 @@ describe('Given the addCmsGatewayHostname helper', () => {
     describe('When it is called with any other hostname', () => {
         it('Then returns the correct url', () => {
             window.location.hostname = 'test';
-            expect(addCmsGatewayHostname('path/to/something')).toEqual('https://web.www.healthdatagateway.org/path/to/something');
+            expect(addCmsGatewayHostname('path/to/something')).toEqual('https://web.old.healthdatagateway.org/path/to/something');
         });
     });
 });
@@ -69,7 +69,7 @@ describe('Given the addCmsGatewayApiHostname helper', () => {
     describe('When it is called with any other hostname', () => {
         it('Then returns the correct url', () => {
             window.location.hostname = 'test';
-            expect(addCmsGatewayApiHostname('path/to/something')).toEqual('https://api.www.healthdatagateway.org/path/to/something');
+            expect(addCmsGatewayApiHostname('path/to/something')).toEqual('https://api.old.healthdatagateway.org/path/to/something');
         });
     });
 });
diff --git a/src/pages/DataAccessRequest/components/AboutApplication/AboutApplication.js b/src/pages/DataAccessRequest/components/AboutApplication/AboutApplication.js
index 57aed043e..38178174e 100644
--- a/src/pages/DataAccessRequest/components/AboutApplication/AboutApplication.js
+++ b/src/pages/DataAccessRequest/components/AboutApplication/AboutApplication.js
@@ -412,7 +412,7 @@ const AboutApplication = props => {
                                             id='infoGovernanceLink'
                                             target='_blank'
                                             rel='noopener noreferrer'
-                                            href='https://web.www.healthdatagateway.org/collection/4782731178031727'>
+                                            href='https://web.old.healthdatagateway.org/collection/4782731178031727'>
                                             Information governance training recognised by some data custodians
                                         </a>
                                     </p>
diff --git a/src/pages/DatasetOnboarding/components/BeforeYouBegin/BeforeYouBegin.js b/src/pages/DatasetOnboarding/components/BeforeYouBegin/BeforeYouBegin.js
index 929179efe..f0a788e70 100644
--- a/src/pages/DatasetOnboarding/components/BeforeYouBegin/BeforeYouBegin.js
+++ b/src/pages/DatasetOnboarding/components/BeforeYouBegin/BeforeYouBegin.js
@@ -88,7 +88,7 @@ const Summary = props => {
                                         id='exampleDataset1'
                                         target='_blank'
                                         rel='noopener noreferrer'
-                                        href='https://web.www.healthdatagateway.org/dataset/594cfe55-96e3-45ff-874c-2c0006eeb881'>
+                                        href='https://web.old.healthdatagateway.org/dataset/594cfe55-96e3-45ff-874c-2c0006eeb881'>
                                         [COVID-19 Symptom tracker]
                                     </a>
                                 </div>
@@ -97,7 +97,7 @@ const Summary = props => {
                                         id='exampleDataset2'
                                         target='_blank'
                                         rel='noopener noreferrer'
-                                        href='https://web.www.healthdatagateway.org/dataset/31f0148b-f965-4136-ab39-6c5bbbf8c2d9'>
+                                        href='https://web.old.healthdatagateway.org/dataset/31f0148b-f965-4136-ab39-6c5bbbf8c2d9'>
                                         [National COVID-19 Chest Imaging Database]
                                     </a>
                                 </div>
diff --git a/src/pages/commonComponents/AdvancedSearchCohortDiscovery/__snapshots__/AdvancedSearchCohortDiscovery.test.jsx.snap b/src/pages/commonComponents/AdvancedSearchCohortDiscovery/__snapshots__/AdvancedSearchCohortDiscovery.test.jsx.snap
index 52d564abd..932eaf1f8 100644
--- a/src/pages/commonComponents/AdvancedSearchCohortDiscovery/__snapshots__/AdvancedSearchCohortDiscovery.test.jsx.snap
+++ b/src/pages/commonComponents/AdvancedSearchCohortDiscovery/__snapshots__/AdvancedSearchCohortDiscovery.test.jsx.snap
@@ -39,7 +39,7 @@ exports[`Given the AdvancedSearchCohortDiscovery component When it is rendered A
         >
           <img
             alt="Cohort Discovery feature image"
-            src="https://web.www.healthdatagateway.org/"
+            src="https://web.old.healthdatagateway.org/"
           />
         </div>
         <div
diff --git a/src/pages/commonComponents/AdvancedSearchDataUtilityWizard/__snapshots__/AdvancedSearchDataUtilityWizard.test.jsx.snap b/src/pages/commonComponents/AdvancedSearchDataUtilityWizard/__snapshots__/AdvancedSearchDataUtilityWizard.test.jsx.snap
index 68874da55..ed2e8c109 100644
--- a/src/pages/commonComponents/AdvancedSearchDataUtilityWizard/__snapshots__/AdvancedSearchDataUtilityWizard.test.jsx.snap
+++ b/src/pages/commonComponents/AdvancedSearchDataUtilityWizard/__snapshots__/AdvancedSearchDataUtilityWizard.test.jsx.snap
@@ -39,7 +39,7 @@ exports[`Given the AdvancedSearchDataUtilityWizard component When it is rendered
         >
           <img
             alt="search.advanced.dataUtilityWizard.mediaAlt"
-            src="https://web.www.healthdatagateway.org/"
+            src="https://web.old.healthdatagateway.org/"
           />
         </div>
         <div
diff --git a/src/pages/dataset/DatasetPage.js b/src/pages/dataset/DatasetPage.js
index f37b0215f..e08dbf31a 100644
--- a/src/pages/dataset/DatasetPage.js
+++ b/src/pages/dataset/DatasetPage.js
@@ -364,7 +364,7 @@ class DatasetDetail extends Component {
             linkedDatasets.push({
                 title: relation,
                 info:
-                    relation.slice(0, 46) === 'https://web.www.healthdatagateway.org/dataset/'
+                    relation.slice(0, 46) === 'https://web.old.healthdatagateway.org/dataset/'
                         ? 'Dataset on the gateway'
                         : 'Dataset not on the gateway',
                 type: 'externallink',
diff --git a/src/pages/dataset/DatasetSchema.js b/src/pages/dataset/DatasetSchema.js
index 31256dfc0..eba2775a1 100644
--- a/src/pages/dataset/DatasetSchema.js
+++ b/src/pages/dataset/DatasetSchema.js
@@ -7,7 +7,7 @@ const DatasetSchema = ({ data }) => {
             '@context': 'http://schema.org/',
             '@type': 'Dataset',
             identifier: data.pid,
-            url: `https://web.www.healthdatagateway.org/dataset/${data.pid}`,
+            url: `https://web.old.healthdatagateway.org/dataset/${data.pid}`,
             name: data.datasetv2.summary.title,
             description: data.datasetv2.summary.abstract,
             keywords: data.datasetv2.summary.keywords,
diff --git a/src/pages/search/components/CoursesSearchResults/mockData.js b/src/pages/search/components/CoursesSearchResults/mockData.js
index 82458d22c..6794e01df 100644
--- a/src/pages/search/components/CoursesSearchResults/mockData.js
+++ b/src/pages/search/components/CoursesSearchResults/mockData.js
@@ -572,7 +572,7 @@ export const data = [
         title: 'MRC Regulatory Support Centre: Research Data and Confidentiality e-learning - DISCONTINUED',
         provider: 'Medical Research Council',
         description:
-            '** THIS COURSE HAS BEEN DISCONTINUED**\n\nThis MRC course has been discontinued but is still accepted as approved training for researchers to conduct research in the SAIL and EPCC Scotland Trust Research Environments if they have completed it previously.  \n\nCourse Duration: 3 hours online\n\nMRC provides an alternative course that is recognized by SAIL and EPCC Scotland: https://web.www.healthdatagateway.org/course/7853810507803276',
+            '** THIS COURSE HAS BEEN DISCONTINUED**\n\nThis MRC course has been discontinued but is still accepted as approved training for researchers to conduct research in the SAIL and EPCC Scotland Trust Research Environments if they have completed it previously.  \n\nCourse Duration: 3 hours online\n\nMRC provides an alternative course that is recognized by SAIL and EPCC Scotland: https://web.old.healthdatagateway.org/course/7853810507803276',
         myEntity: false,
     },
     {
diff --git a/src/setupTests.js b/src/setupTests.js
index 81c63d848..7505e41a6 100644
--- a/src/setupTests.js
+++ b/src/setupTests.js
@@ -85,7 +85,7 @@ global.redefineWindow = () => {
                 value: jest.fn(),
             },
             hostname: {
-                value: 'web.www.healthdatagateway.org',
+                value: 'web.old.healthdatagateway.org',
             },
         }
     );
@@ -143,6 +143,6 @@ Object.defineProperty(window, 'location', {
     value: {
         href: 'https://www.healthdatagateway.org',
         assign: jest.fn(),
-        hostname: 'web.www.healthdatagateway.org',
+        hostname: 'web.old.healthdatagateway.org',
     },
 });