Discussion
http://www.chrono24.co.uk/
OK, It's International but you can use the site filters for UK only. Don't be to eager to put off buying from Europe either, though make sure it's a reputable seller with a proper store (if going through a dealer). I've bought from Italy and France before now, with no issues. No VAT or duty to pay within the EU, and the exchange rate is favourable at the moment.
http://forums.watchuseek.com/forum.php also have a vast sales forum which, whilst being primarily US orientated, have a good few things over here as well.
There's also some car forum or other (clue: you're on it
) which has some good stuff from time to time, if you can filter out the zillions of commercial ads. 
OK, It's International but you can use the site filters for UK only. Don't be to eager to put off buying from Europe either, though make sure it's a reputable seller with a proper store (if going through a dealer). I've bought from Italy and France before now, with no issues. No VAT or duty to pay within the EU, and the exchange rate is favourable at the moment.
http://forums.watchuseek.com/forum.php also have a vast sales forum which, whilst being primarily US orientated, have a good few things over here as well.
There's also some car forum or other (clue: you're on it
) which has some good stuff from time to time, if you can filter out the zillions of commercial ads. Gassing Station | Watches | Top of Page | What's New | My Stuff