text: When I looked for "Martin's House, Wyvil Road, London" the search results confirmed that its Leasehold apartment with name 'Martin House' and not name of the individual's house. I found websites like these as sources
  http://www.addressesandpostcodes.co.uk/address/MBbtZHwE/flat-24-martin-house-wyvil-road-london-sw8-2sz.html
  which cannot be used as a data source to add it in OSM. I added this note to get the data confirmed from the local mappers. So It would be great if you can confirm this and update the map.