Just been to look at
http://www.atlasreed.co.uk and they seem to do HHO training in partnership with a German outfit called HRC GmbH. Looks like they focus on the alpine rescue market using small/med helicopters like EC135, Squirrel, BK117, etc. Not sure they have done anything in the UK yet. Good to see someone other than the military and DHFS offering this kind of training.