Use the GOV.UK shim-links-with-button-role.js script

By default, this behaviour will only be applied to links with a role of button.
<a class="button" role="button">A button</a>

This script will allow them to be triggered with a space key after they’ve been focused, to match standard buttons.

app/assets/javascripts/application.js

@@ -105,6 +105,10 @@ $(document).ready(function () {
   var $blockLabels = $(".block-label input[type='radio'], .block-label input[type='checkbox']")
   new GOVUK.SelectionButtons($blockLabels) // eslint-disable-line
 
+  // Use GOV.UK shim-links-with-button-role.js to trigger a link styled to look like a button,
+  // with role="button" when the space key is pressed.
+  GOVUK.shimLinksWithButtonRole.init();
+
   // Show and hide toggled content
   // Where .block-label uses the data-target attribute
   var toggleContent = new ShowHideContent()