I don't know a Refoel Grosskopf in London, but he is probably one of my 3rd or 4th cousins. My brother Rafi from Manchester wasn't named after anyone in particular.
To my knowledge, all UK Grosskopfs are descended from my great grandfather, Asher Zelig o's. He is buried in Blackley in Manchester. He had 8 children, including my grandfather.
My father tells me we were originally Sassover Chassidim.
By the way, have did you know that one of Lenin's ancestors was called Anna Groschopf http://en.wikipedia.org/wiki/Blank_family
- any relation?