TTH,
Two good 'picks'.
I shall be up close and personal (I hope) with a CH53 in Germany next month but didn't Wastelands acquire and register a Blackhawk some years ago and wasn't that supposed to have been evaluated for use by the Brits?
A couple of years ago, I saw one of a pair of Mi17s which were in this country to train crews for an 'allied air force'. It looked like an overgrown Whirlwind but was said to be reliable, very functional (agricultural was also used to describe it) good to operate, carried shed loads of kit over a good distance and relatively easy to maintain. Perhaps, therefore, Mi17s instead of - dare I say - Wessex?
O-D