Help needed please - marks on plate

We have a boxed set of scalloped dessert “jelly” spoons - inherited from grandparents. There are five clear marks on each piece - (A1) (EP) (*) (S) (W.T). I have checked a couple of sites for English electroplate marks, but cannot trace the maker W.T Can anyone help please?
EP Spoon.jpg

Sheffield, England.

Many thanks for the identification - I must have been looking in the wrong place!