anchor.diff:            <td><%= meter.meter_type.humanize %></td>
             <td><%= meter.amr_data_feed_readings.count %></td>
             <td><%= meter.amr_validated_readings.count %></td>
  +          <td><%= meter.first_validated_reading %></td>
  +          <td><%= meter.last_validated_reading %></td>
             <td>
               <div class="btn-group">
                 <%= link_to 'Delete', school_meter_path(@school, meter), method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn btn-sm btn-danger' %>
  
positive.code:           <td><%= meter.meter_type.humanize %></td>
            <td><%= meter.amr_data_feed_readings.count %></td>
            <td><%= meter.amr_validated_readings.count %></td>
            <td>
              <div class="btn-group">
                <%= link_to 'Edit', edit_school_meter_path(@school, meter), class: 'btn btn-sm btn-warning' %>
  
negative.code:       <th>Meter Type</th>
        <th>Imported Readings</th>
        <th>Validated readings</th>
        <th>First validated reading</th>
        <th>Latest validated reading</th>
        <th>Actions</th>
      </tr>
    </thead>
    <thead>
      <tr>
        <th colspan="7">Active meters</th>
      </tr>
    </thead>
    <tbody>
  