I've contacted a seller to retract a bid, the seller is happy to cancel the bid as its has more than

[**peaseblossom**]

Here's the link:

http://offer.ebay.co.uk/ws/eBayISAPI.dll?RetractBidShow

If you have any problems with that ask the seller to cancel it.    There are time restrictions for bidders but sellers can cancel bids right up to the final seconds of an auction.