Update bulk sending, postage and upload

app/templates/views/features/letters.html

@@ -25,18 +25,19 @@
     <ul class="list list-bullet">
       <li>create reusable letter templates</li>
       <li>personalise the content of your letter</li>
-      <li>send bulk messages</li>
+      <li>send letters in bulk</li>
     </ul>
     <p>You can also <a href="{{ url_for('.documentation') }}">integrate with our API</a> to send letters automatically.</p>
 
     <h3 class="heading-small">Choose your postage</h3>
-    <p>You can send letters by first or second class post.</p>
+    <p>Notify can send letters by first or second class post.</p>
     <p>First class letters are delivered one day after they’re dispatched. Second class letters are delivered 2 days after they’re dispatched.</p>
     <p>Letters sent before 5:30pm are dispatched the next working day (Monday to Friday). Royal Mail delivers from Monday to Saturday, excluding bank holidays.</p>
 
     <h3 class="heading heading-small">Upload your own letters</h3>
-    <p>You can create reusable letter templates in Notify, or upload and send your own letters.</p>
+    <p>You can create reusable letter templates in Notify, or upload and send your own letters with the Notify API.</p>
     <p>Use the <a href="https://docs.notifications.service.gov.uk/documentation/images/notify-pdf-letter-spec-v2.3.pdf">letter specification document</a> to help you set up your letter, save it as a PDF, then upload it to Notify.<p>
+    <p>Read the <a href="{{ url_for('.documentation') }}">API documentation</a> for more information.</p>
 
     <h2 class="heading heading-medium">Pricing</h2>
     <p>It costs between 30p and 76p (plus VAT) to send a letter. Prices include:</p>