In reply to that bouldering guy:
I'd fully agree with the Huntsham's recommendations, some really good stuff out there. Useful original topo link here
http://esotericbouldering.com/wales/huntsman.pdf
Also Ladye Bay has some really good bouldering with some of the harder problems being well worth the 30-40mins drive from Bristol. James Squire's topo blog gives a good round-up of the place but more's been added since, UKC logbook gives good descriptions of the rest
http://www.beastlysquirrelblog.com/#/ladye-bay/4569514566
Winterbourne Down is OK for a bit of highball fun if you've got a handful of mats and spotters. Wikitopo here
http://www.wikitopo.com/crag.php?cragId=298
Ring road is also cool for some eliminate based entertainment, think someone has already linked the Esoteric Bouldering topo.
I'd avoid Gollums cave like the plague unless you'd like to get the plague. Depending on how hard you like to boulder there's a cool problem at the left end of New Quarry in the gorge - YouTube Bitter and Twisted traverse to see someone far stronger than me climb it.
Hope some of that helps. I'm usually out at one or another place during the week or doing sport down cheddar or something but if you want to head out bouldering give me a shout.