Found this guy through eBay, his site doesn't pop up on Google searches so I thought I'd promote it a little here as it's probably the cheapest place I've found for smoking woods and I don't want him to go out of business! 5 kilos of chunks for under fourteen quid can't be beaten I don't think!
You really need to speak to Paul Goulden. I always get my wood from him and his prices seam better than I could see on that website. his web address is http://bbqsmokingwood.co.uk/. I get a mix of apple and oak about 30kg for £30 and he can deliver as well. The quality of the wood is really good as well.
You can't get pimento wood in the UK (it's apparently very difficult to grow anywhere outside the carribean), and whilst they will ship here, it's expensive.
Last I head they were interested in getting a UK outlet.
In that case I'll get in touch with Goulden's next time I need some chunks, I've got 5kg of hickory to get through at the moment I've not been that keen on oak in the past, but maybe mixing it with fruit wood would help