message: Remove mention of `distance` attribute for nearest outcodes method
diff: <code>radius=</code> (not required) Limits number of postcodes matches
  to return. Defaults to 5,000m. Needs to be less than 25,000m.
  </p>
  - <h4>Additional Response Attributes</h4>
  - <p><code>distance</code> Distance in metres from specified postode</p>
  <h3 id="scottish-postcode">Scottish Postcode Lookup</h3>
  <p>
  Lookup a Scottish postcode. Returns SPD data associated with postcode.
  