Rather than ask for restaurant recommendations (for which I can search the board, and I also have some ideas from previous visits) I thought that I'd try a different question, given that the North West is a fertile area for the regional / seasonal approach.
So what is likely to be good in October, any great local specialities that will be starting to appear on menus or any great local ingredients coming into season?. If you like, suggest where I might find excellent examples of these.
As an example, last time I visited Portland, it was earlier in the summertime last year, and hazelnuts were everywhere, and I got to sample huckleberries too.
Thanks, Pete (UK)