Personally I think I'd prefer the current offering from
www.Maplin.co.uk (with quidco opportunity)- assuming you're near to one of their stores as their free postage offer over last weekend (found here) has expired.
Product code L06BR
2.5A Max. Variable Voltage Plug Top Switched Mode Power Supply
only £8.99 - on sale until 08/07/2008
I thought I'd found this offer here too, but couldn't spot it when I looked.
The Maplin has wider range of voltages (I specifically wanted it for the 12V 1.4A) and one extra tip and is published as a 'switched mode' supply which should be more electrically efficient than some designs.