<!--
Code for the tabbed interface for this W3C Silver Prototype was lovingly ripped from https://inclusive-components.design/tabbed-interfaces/ with the example code taken from https://codepen.io/heydon/pen/veeaEa .

All credit for this goes to Heydon Pickering https://twitter.com/heydonworks.
You should totally buy his book on Inclusive Components.
-->

<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <title>Plain Language Prototype</title>
    <link rel="stylesheet" href