Thanks all, have managed to get two quotes. RAF Benson at £5000 ph and an operator near Birmingham at £750ph. Not managed to get hold of Leon yet but thanks Bravo73, I will keep trying.

I'll update once the lift is complete.

If it is no more than 500 kg I can do it with a 500 but the route and permission from the bods at the Belgrano may be interesting ! PM me

Leon at Helicopter Services even moved a giant dinosaur for a theme park once!
2Sticks

Thanks very much Sticks and 500. I am almost embarassed, but financially relieved, to report back that the neighbour, after being quite hostile, agreed to "thin" the trees so with some pushing and bending of remaining branches we got the pool in by truck yesterday.

Damn, thought somebody was going to sling load my treehouse!!!!:E