If you go to the Free BirthMarriageDeath Search site at:
http://freebmd.rootsweb.com/cgi/search.pl

you'll find an Edwin Lawrence Leonard in the June 1901 Marriage Register listed in W Derby Volume 8B Page 516. There are instructions there on how to obtain a copy. Looks like the bride might have been Margaret McKeown Brown, but since there were two marriages listed and they don't link the couples that could be wrong, but the transcription of the location matches.

Kind regards,
BB