I think it is a James A Silver. And she needs a bit of TLC. The name begins with Silver forgotten the second word though. Strange detail to know about but the exhaust pipe skin fittings are different diameters. maybe she has twin engines but different units or maybe main and wing engines?
Definitely a Silver. They used the same style for a few different lengths.
A real Gentleman's Yacht.
Remember admiring it each time we passed, on our way to the estuary.
It used to be kept in pretty good shape. Sad if it is no longer.