You also want to check your pump basket, and if you can reach it, the throat of the impeller, to make sure it's not jammed up with leaves and twigs that slipped round the pump basket.

If you have a multiport valve on your filter, with a "recirculate" position, you can test to see if the problem is the filter or the pump, but putting the valve in that position. If you get normal circulation, the problem is the filter. If you still have weak circulation, the problem is the pump.

By the way, I hate addresses manufactured by builders and real estate agents. Obviously, England's got a leg up, having addresses that are 100s of years old. But, still, living next to "Polecat Woods" is nice! In British English, is a "polecat" a type of skunk? I'd assumed the term was an Americanism.