[Paul Levy]

I can't speak about Bristol I'm afraid, but talking about c) it might not be that different from London, where most of the high-stakes live players are a bunch of middle aged geezers that would be massacred if they played $50 tourneys or 1/2 cash games on Stars.
That's also the reason why you can hardly find a NL cash game spread in London, where they have these super-deep suckout-friendly Pot-Limit games instead.

The problem with tourneys in London (which might also apply to Bristol) is the lack of mid-size buy-ins. You either find £60 and below tourneys without a dealer or very high stakes events (£250 f/o or £100 rebuy, although £250 rebuy is not unheard of). The biggest size I've played in London was a super-deep stacked £330, which I would compare to a Stars $100, and a few £100, that played like a Stars $50.

I would guess that if your pockets are deep enough there might be great value, as you would probably be facing mostly old-school gamblers that have no clue about elementary concepts such as short-stack play.