Well I have just checked the packaging, does'nt say it can't be used in UK, and the writing on the packaging is mostly German .
Still, I think the charger is a good one for the dosh, and I can easily put a 3 pin plug with a 5amp fuse so I still think it was a good deal for £20 , ...as it is an optimiser rather than a straight charger. Plus...it has some cool lights on it.
Might just phone HG head office on Monday just to check if they should have provided an adaptor and see what their response is... just out of interest really
Only started this post to let forum know that I thought it was good, but all the comments have been interesting, thanks.