My Dad was born 3 Aug 1907 ... I've found him on FreeBMD in the Sept Q for Fulham, (and have just sent for the cert from GRO) ... named as HANHAM, William Frederick.
The birth cert he had was issued in 1930, under the name of William Frederick Poplett ... father unknown, mother Caroline Hanham. I knew he was illegitimate, and the man Caroline subsequently married was Alfred Poplett ... but she married him a year after my fathers birth, and on his apprenticeship papers dated 1924, 'father' has been crossed out, and 'guardian' substituted all the way thru', guardian being named as Alfred Poplett.
A nice little roots mystery to be solved !
Lydart