It's Sci-Fi/Fantasy Convention in Bristol. It's still in infancy, only in the second year. I didn't know about it last year, so really glad to find something on my doorstep.
There are benefits of a new convention of course - first, I will have the pleasure of knowing it from the beginning so in 20 years I could say, "Oh I have been here forever" ;) and it's cheaper than usual. But it doesn't mean rubbish, because there are some wonderful writers coming - two of whom are Joe Abercrombie who wrote the First Law Fantasy trilogy and Paul Cornell, who among other things writes Dr. Who episodes.
The convention is on November 6th, but I am already registered, and really looking forward to it.