I can't offer much I'm afraid, except to say that if your father was laying mines in advance of D-Day, he may have been involved in Operation Monastic
. As I understand it, this involved the 13th, 14th and 64th Flotillas. Both the 13th and 14th operated Vosper MTBs and laid ground mines, whilst the 64th, operating Fairmile D boats, laid moored mines.
There's some brief information about it in Dog Boats at War
and MTBs and MGBs in Home Waters
, both by Leonard Reynolds. There's probably a lot more in this source at The National Archives: http://discovery.nationalarchives.gov.u ... 03&catln=6
. However, although flotillas and individual boats may be named in this report, it's unlikely that any individuals (except commanding officers) are named.
Hope this is of some use.