A posting on the macrumors site is saying Toys 'R' Us are selling macs (prob display models) very cheap.
I can't confirm (stuck at work) but could be a bargain if anything is left. See this link for more details http://forums.macrumors.com/showthread.php?t=343050
Might be worth a trip or some calls, with alleged prices such as:
Mac Mini (Intel) - £199
Mac Mini (PPC) - £99
.mac boxed - £19
Macbook - £379 (!)
iMac - £279 (not sure which model, I suspect a PPC at this price though)
Just thought I'd share it - maybe someone will get a bargain!!
Update: Reported that Milton Keynes have an ex-display MacBook at £399 - good condition, and an iMac again at £399.