Angela, You can search for BMDs on FreeBMD at: http://freebmd.rootsweb.com/cgi/search.pl the marriage entry for Percy is there: Sep Q 1923 George Percy R May Bethnal G 1c 322 but the other hasn't yet been transcribed but checking on the indexes there is a matching entry for a Dorothy May. As for the children you need to go to the GRO indexes, you have the advantage of knowing the wife's maiden name which is listed on the index after c1915 so identify an appropriate entry is relatively easy vs when the maiden name wasn't listed. Alternatively you can wait until FreeBMD transcribes more births, there are currently no suitable entries post 1923 but it is being updated on a regular basis. Bob