I contacted the guys on ebay selling them. The chargers are universal, and will accept an input anywhere between 110V and 240V. They come fitted with a 2 prong US style plug, so you just get a travel adapter or change it to a UK plug, and you're set to go.
I've seen posts from a couple of guys (On another forum) who bought them and recommended them highly. Import Duty and VAT is payable when they arrive and comes to about £25,.. most of which is the VAT and can be claimed back anyway.