Sugar tongs

Hi, Please could you help me identify these markings, The only bit I’ve not managed to get in the picture is a circle with an A in it. Also is everything with EP on it more or less worthless?
Sugar tongs.jpg

Electroplate by W W Harrison & Co of Sheffield.

It would be wrong to say that everything with EP on is worthless. However in general electroplated wares, especially flatware, have very little commercial value. There are some notable exceptions of course. Elikington made some very fine electroplated holloware which commands good prices.