<!DOCTYPE html>
<html>
<head>
  <title>Pensions Guidance</title>
  <link rel="stylesheet" href="stylesheets/main.css">
</head>
<body>
<div id="wrapper" class="guide">
  <main id="content" role="main" class="group">
    <header class="page-header group">
      <div>
        <h1><%= yield_content :page_title %></h1>
      </div>
    </header>

    <div class="article-container group">
      <article role="article" class="group">
        <div class="inner">
          <%= yield %>
        </div>
      </article>
    </div>

    <div class="meta-data group">
      <p class="modified-date">Last updated: 16 September 2014</p>
    </div>
  </main>
</div>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
  <title><%= yield_content :page_title %>- GOV.UK</title>
  <link rel="stylesheet" href="stylesheets/main.css">
</head>
<body>
<div id="wrapper" class="guide">
  <main id="content" role="main" class="group">
    <header class="page-header group">
      <div>
        <h1><%= yield_content :page_title %></h1>
      </div>
    </header>

    <div class="article-container group">
      <article role="article" class="group">
        <div class="inner">
          <%= yield %>
        </div>
      </article>
    </div>

    <div class="meta-data group">
      <p class="modified-date">Last updated: 16 September 2014</p>
    </div>
  </main>
</div>
</body>
</html>

Make title tag use page title
Make title tag use page title