For anyone who caught the Vtech V.Smile Console deal from Currys recently, this should be ideal (thanks melandtony).
Not worth getting unless you have a PC World nearby and collect because postage is £4.95.
Next cheapest price I can find on-line for the official adaptor is £7.00 from Elc.co.uk
Don't forget Quidco to save an additional 10p!! (2.5%).