It's a pseudo-mark, not a British silver hallmark. There is no date letter and the lion passant is just weirdly wrong. The central mark may be the best clue to its origin but I can't work out what it's supposed to be.
This set of marks represent an unidentified NYC wholesale manufacturer presumed to be associated with Albert Coles. They are only found on hollow-handled pieces such as this and match his handle die designs.