I've got a few jackets and smocks for the winter, a Dickies Camouflage smock, and a Hoggs of Fife jacket. The Hoggs Culloden is the current equivalent, not cheap, probably around ÂŁ130 and they do matching overtrousers.
As good as fishing clothing is, I've had a preference for shooting/country clothing or army surplus style.
I should add an edit, my Hoggs jacket, despite being worn for fishing is still in good enough condition to wear out for normal walking.