anchor.diff:            </thead>
             <tbody>
               <tr>
  -              <td>mbox</td>
  +              <th scope="row">mbox</th>
                 <td>This is used to keep your progress through the survey.</td>
                 <td>30 minutes</td>
               </tr>
               <tr>
  -              <td>SSOE</td>
  +              <th scope="row">SSOE</th>
                 <td>This is used for testing different content and features on the survey website to help make it better.</td>
                 <td>when you close your browser</td>
               </tr>
               <tr>
  -              <td>TS5159a2<br />TSd0b041</td>
  +              <th scope="row">TS5159a2<br />TSd0b041</th>
                 <td>These are used to manage survey traffic by sending your computer to a specific server.</td>
                 <td>when you close your browser</td>
               </tr>
               <tr>
  -              <td>ep201</td>
  +              <th scope="row">ep201</th>
                 <td>This is used to help us identify how people use the survey.</td>
                 <td>30 minutes</td>
               </tr>
               <tr>
  -              <td>ep202</td>
  +              <th scope="row">ep202</th>
                 <td>This works with ep201 to help us identify how people use the survey.</td>
                 <td>1 year</td>
               </tr>
  
positive.code:           </thead>
            <tbody>
              <tr>
                <td>govukgeo</td>
                <td>Saves details about your location so that services which require
                this information are consistent</td>
                <td>4 months</td>
  
negative.code:           </thead>
            <tbody>
              <tr>
                <th scope="row">govuk_not_first_visit</th>
                <td>Saves a message to know that you've visted us once, and to show you the message next time</td>
                <td>28 days</td>
              </tr>
              <tr>
                <th scope="row">govuk_browser_upgrade_dismissed</th>
                <td>Saves a message to let us know you've seen and dismissed the browser upgrade prompt.</td>
                <td>14 days</td>
              </tr>
  