No need to investigate. It is Thomas Webb, as JP first said 
Nigel
YES, its WEBB, enough already!
Before the square vs round response by johnphillip, I wished to look up about Webb. After viewing the "vs" post I looked at my piece and now is the first chance to respond. Its square.........YES, its Webb
Thanks all, even if I do feel a little pummeled.
>>>>and this should be under British Glass

IS this before or after finding out where the piece was actually made?

?