SK53
Really! These are live addresses along this road (as shown by, for instance, Zoopla https://www.zoopla.co.uk/house-prices/kingston-upon-thames/hawks-road/claremont-villas/kt1-3df/#!), someone local could just wall along it and spot them. I know they are in use because, until recently, friends of mine owned one.

UPRNs etc may enable this to be resolved as it's possible that the Claremont Villas houses have a separate postcode from the rest of Hawks Road. Also if they are pre-war they may be on one of the out-of-copyright map layers.