Consider what to include by default as meta tags and icons

[frankieroberto]

The current page template contains these by default in the page template:

  <link rel="shortcut icon" href="/nhsuk-frontend/assets/favicons/favicon.ico" type="image/x-icon">
  <link rel="apple-touch-icon" href="/nhsuk-frontend/assets/favicons/apple-touch-icon-180x180.png">
  <link rel="mask-icon" href="/nhsuk-frontend/assets/favicons/favicon.svg" color="#005eb8">
  <link rel="icon" sizes="192x192" href="/nhsuk-frontend/assets/favicons/favicon-192x192.png">
  <meta name="msapplication-TileImage" content="/nhsuk-frontend/assets/favicons/mediumtile-144x144.png">
  <meta name="msapplication-TileColor" content="#005eb8">
  <meta name="msapplication-square70x70logo" content="/nhsuk-frontend/assets/favicons/smalltile-70x70.png">
  <meta name="msapplication-square150x150logo" content="/nhsuk-frontend/assets/favicons/mediumtile-150x150.png">
  <meta name="msapplication-wide310x150logo" content="/nhsuk-frontend/assets/favicons/widetile-310x150.png">
  <meta name="msapplication-square310x310logo" content="/nhsuk-frontend/assets/favicons/largetile-310x310.png">

We should consider whether these are still the most appropriate icon sizes and meta tags to include, or if they should be any updates to them.

For example:

• are the msapplication-* tags still needed?
• should <meta name="theme-color"> be added?
• should we have a Pinned tab icon using <link rel="mask-icon">?
• are there any other sizes of icons needed?

[frankieroberto]

Helpful research from GOVUK team: alphagov/govuk-frontend#4175 (comment) (albeit a couple of years old)