anchor.diff:            </thead>
             <tbody>
               <tr>
  -              <td>govuk_takenUserSatisfactionSurvey</td>
  +              <th scope="row">govuk_takenUserSatisfactionSurvey</th>
                 <td>Saves a message to remember if you have taken the survey or dismissed it.</td>
                 <td>4 months</td>
               </tr>
  
positive.code:           </thead>
            <tbody>
              <tr>
                <td>_use_hitbox</td>
                <td>This is a randomly generated number that identifies your browser</td>
                <td>when you close your browser</td>
              </tr>
              <tr>
                <td>VISITOR_INFO1_LIVE</td>
                <td>Set when viewing a page with Youtube videos on it. It is set by Youtube so they can count the views of embedded Youtube videos on them.	</td>
                <td>9 months</td>
              </tr>
  
negative.code:           </thead>
            <tbody>
              <tr>
                <th scope="row">seen_cookie_message</th>
                <td>Saves a message to let us know that you have seen our cookie message.</td>
                <td>1 month</td>
              </tr>
              <tr>
                <th scope="row">dp-tour</th>
                <td>Saves a message to let us know that you have seen our welcome message
                  on the GDS Design Principles.</td>
                <td>7 days</td>
  