Convert radios on research consent (basic)

app/main/forms.py

@@ -1569,13 +1569,16 @@ class EstimateUsageForm(StripWhitespaceForm):
         things='letters',
         format_error_suffix='you expect to send',
     )
-    consent_to_research = RadioField(
+    consent_to_research = GovukRadiosField(
         'Can we contact you when we’re doing user research?',
         choices=[
             ('yes', 'Yes'),
             ('no', 'No'),
         ],
         thing='yes or no',
+        param_extensions={
+            'hint': {'text': 'You do not have to take part and you can unsubscribe at any time'}
+        }
     )
 
     at_least_one_volume_filled = True

app/templates/views/service-settings/estimate-usage.html

@@ -3,7 +3,6 @@
 {% from "components/form.html" import form_wrapper %}
 {% from "components/page-header.html" import page_header %}
 {% from "components/page-footer.html" import page_footer %}
-{% from "components/radios.html" import radios %}
 
 {% block service_page_title %}
   Tell us how many messages you expect to send
@@ -39,7 +38,7 @@
             "hint": {"text": "For example, 50,000"},
           }) }}
         </div>
-        {{ radios(form.consent_to_research, hint='You do not have to take part and you can unsubscribe at any time') }}
+        {{ form.consent_to_research }}
         {{ page_footer('Continue') }}
       {% endcall %}
     </div>