There is a christening record on this site (England and Wales Christening Records) for a Thomas William Baldwin, born September 22, 1810, christened October 14, 1810, at Beckenham, Kent...parents are John and Avis. Beckenham is about 3 miles from West Wickham. This may be your Thomas. Also on this site, there is a record and image for the marriage of a John Baldwin and an Avis Bridgland on November 4, 1809, at Lewisham, St. Mary. (London, England Marriages and Banns) There is more info on the image, including what appears to be a notation giving their birthplaces.
Linda