Update the how-to-vote schema

This update covers the passing of the deadline for applying for a proxy vote.

This should match: https://publisher.publishing.service.gov.uk/editions/607f4743d3bf7f331cd037f7/diff
and https://docs.google.com/document/d/17i_0rH67XgBn2dy0DIQbCC0PLxiZofTkohbw042qtV0/edit#heading=h.dps7tpi6q19r

config/machine_readable/how-to-vote.yml

@@ -36,7 +36,7 @@ faqs:
     answer: >
       <p>Elections and referendums are going ahead during coronavirus (COVID-19), though you may see changes to some processes. You can still vote in person at a polling station.</p>
       <p>If you’re self-isolating, <a rel="external" href="https://www.nhs.uk/conditions/coronavirus-covid-19/people-at-higher-risk/who-is-at-high-risk-from-coronavirus-clinically-extremely-vulnerable/?src=schema">clinically extremely vulnerable</a>, or do not want to go to the polling station, you can <a href="/how-to-vote?src=schema#postal-voting">vote by post</a> or <a href="/how-to-vote?src=schema#voting-by-proxy">vote by proxy</a>.</p>
-      <p>From 5pm on 27 April you’ll also be able to get an emergency proxy vote at short notice if you need to self-isolate shortly before or on election day.</p>
+      <p>You may also be able to get an emergency proxy vote at short notice if you need to self-isolate shortly before or on election day.</p>
       <h2 id="at-the-polling-station">At the polling station</h2>
       <p>Because of COVID-19, there will be safety measures in place at polling stations to help you vote safely (for example, a one-way system or restrictions on the number of people allowed in).</p>
       <p>If you choose to vote in person, make sure you:</p>
@@ -47,7 +47,14 @@ faqs:
         <li>keep to <a href="/government/publications/how-to-stop-the-spread-of-coronavirus-covid-19/how-to-stop-the-spread-of-coronavirus-covid-19?src=schema">social distancing guidelines</a></li>
       </ul>
       <h2 id="if-you-have-covid-19-symptoms-or-have-been-asked-to-self-isolate">If you have COVID-19 symptoms or have been asked to self-isolate</h2>
-      <p>Do not visit the polling station. You’ll be able to apply for an emergency proxy vote instead from 5pm on 27 April.</p>
+      <p>Do not visit the polling station. Apply for an emergency proxy vote instead. Your proxy can also apply if they develop symptoms.</p>
+      <p>You can apply until 5pm on 6 May. There are different forms to:</p>
+      <ul>
+        <li><a rel="external" href="https://www.electoralcommission.org.uk/media/8358?src=schema">apply for an emergency proxy vote in England</a></li>
+        <li><a rel="external" href="https://www.electoralcommission.org.uk/media/7528?src=schema">apply for an emergency proxy vote in Scotland</a></li>
+        <li><a rel="external" href="https://www.electoralcommission.org.uk/media/8154?src=schema">apply for an emergency proxy vote in Wales</a></li>
+      </ul>
+      <p>If you’re voting in the Scottish Parliament or Senedd (Welsh Parliament) elections, you must have become aware of the need to self-isolate after 5pm on 27 April.</p>
 
   - question: Voting in person
     answer: >
@@ -84,7 +91,7 @@ faqs:
       <p>Arrange to <a href="/how-to-vote/voting-by-proxy?src=schema">vote by proxy</a> if there are under 2 weeks until election day and you have not made arrangements.</p>
       <p>There’s a different form to <a href="https://www.eoni.org.uk/Vote/Voting-by-post-or-proxy">apply to vote by post in Northern Ireland</a>.</p>
       <h3 id="postal-vote-deadlines-for-6-may-elections">Postal vote deadlines for 6 May elections</h3>
-      <p>You can no longer apply for a postal vote for the elections on 6 May 2021. You can still apply for a proxy vote.</p>
+      <p>You can no longer apply for a postal vote for the elections on 6 May 2021.</p>
 
   - question: Voting by proxy
     answer: >
@@ -98,7 +105,21 @@ faqs:
       <h2 id="how-to-apply-for-a-proxy-vote">How to apply for a proxy vote</h2>
       <p><a href="/government/collections/proxy-voting-application-forms?src=schema">Apply for a proxy vote</a> using a paper form. You need to send it to your local <a href="/contact-electoral-registration-office?src=schema">Electoral Registration Office</a>.</p>
       <p>Usually, you need to apply for a proxy vote at least 6 working days before election day if you want to vote in England, Scotland or Wales.</p>
-      <p>If you want to vote by proxy on 6 May 2021, your application form must arrive at your local Electoral Registration Office by 27 April at 5pm.</p>
+      <p>You can no longer apply for a proxy vote for the elections on 6 May 2021. You may be able to apply for an emergency proxy vote.</p>
+      <p>There’s a different form to <a rel="external" href="http://www.eoni.org.uk/Vote/Voting-by-post-or-proxy?src=schema">apply to vote by proxy in Northern Ireland</a>. Apply at least 14 working days before election day.</p>
+      <h3 id="apply-for-an-emergency-proxy-vote">Apply for an emergency proxy vote</h3>
+      <p>If the proxy vote deadline has passed you may be able to apply for an emergency proxy vote if you both:</p>
+      <ul>
+        <li>cannot vote in person because of your employment or a disability</li>
+        <li>became aware of this reason after the proxy deadline</li>
+      </ul>
+      <p>You can apply until 5pm on the day of the election. Fill in a paper form to:</p>
+      <ul>
+        <li><a rel="external" href="https://www.electoralcommission.org.uk/media/6206?src=schema">apply to vote by emergency proxy based on your employment</a></li>
+        <li><a rel="external" href="https://www.electoralcommission.org.uk/media/6205?src=schema">apply to vote by emergency proxy based on your disability</a></li>
+      </ul>
+      <p>An ‘appropriate person’ (for example your employer or a doctor) must sign the application form. Send it to your local <a href="/contact-electoral-registration-office?src=schema">Electoral Registration Office</a>.</p>
+      <p>You can also <a href="/how-to-vote?src=schema#voting-and-coronavirus">apply for an emergency proxy vote if you or your proxy need to self-isolate because of COVID-19</a>.</p>
 
   - question: Voting from abroad
     answer: >