Really good Dell @ £566 http://www.hotukdeals.com/item/182581/dell-xps-m1530-core2duo-t7250-2ghz-/ Cheapo Dell @ £270 http://www.hotukdeals.com/item/182980/dell-vostro-1400-notebook-1-86-m540/
yeah mate of mine ordered one, weeks and weeks later after threatening legal action they cancelled his order...
Ordered 5-6 Dell's in past year (friend's, family & neighbours - [Quidco commision ] and never had a problem. Normally when you order them they give you a lead time. All Dells are built to order. Sometimes, if the system you want is extremely popular, ie. it's that damn cheap it's probably a missprice - Then they have been known to cancel your order.
Currys are doing a Samsung for 399 reduced from 529, got one for our young un yesterday. It's decent, has 2gb of ram and 160gb hard drive.