anchor.diff:            <ul>
               <li><a href="http://www.number10.gov.uk/history-and-tour/virtual-tour-of-number-10/" rel="external">10 Downing Street</a></li>
               <li><a href="http://www.hm-treasury.gov.uk/about_11downingst.htm" rel="external">11 Downing Street</a></li>
  -            <li><a href="http://www.fco.gov.uk/en/about-us/our-history/our-buildings/" rel="external">Foreign and Commonwealth Office buildings</a></li>
  +            <li><a href="http://webarchive.nationalarchives.gov.uk/20130117053044/http://www.fco.gov.uk/en/about-us/our-history/our-buildings/" rel="external">Foreign and Commonwealth Office buildings</a></li>
               <li><a href="http://94.236.30.88/DefenceInternet/AboutDefence/History/HistoryOfTheOldWarOffice/ModMainBuilding.htm" rel="external">Ministry of Defence, Whitehall</a></li>
               <li><a href="http://www.hm-treasury.gov.uk/about_1hgr.htm" rel="external">1 Horse Guards</a></li>
               <li><a href="http://www.hm-treasury.gov.uk/about_1hgr.htm" rel="external">Government offices, Great George Street</a></li>
  
positive.code:           <ul>
              <li><a href="http://www.number10.gov.uk/history-and-tour/past-prime-ministers/" rel="external">Prime Ministers</a></li>
              <li><a href="http://www.hm-treasury.gov.uk/about_chancellor.htm" rel="external">Chancellors</a></li>
              <li><a href="http://www.fco.gov.uk/en/about-us/our-history/a-brief-history-fco/foreign-secretaries/" rel="external">Foreign Secretaries</a></li>
            </ul>
          </div>
        </div>
  
negative.code:           <p>You can find out more by exploring these series:</p>
            <ul>
              <li><a href="http://www.number10.gov.uk/history-and-tour/guest-historians/" rel="external">No 10 guest historians</a></li>
              <li><a href="http://webarchive.nationalarchives.gov.uk/20130117053442/http://www.fco.gov.uk/en/about-us/our-history/fco-historians/" rel="external">FCO historians</a></li>
              <li><a href="https://itunes.apple.com/gb/podcast/foreign-commonwealth-office/id391720925" rel="external">FCO history podcast</a></li>
            </ul>
          </div>
  