We have a very large wasps' nest inside the eaves of our roof - football
size. (My question is at the end of this message.)

I've repeatedly sprayed it with the excellent Rentokil "Wasp Nest
Destroyer", but inside the roof space I can can only see (and therefore
spray) the inside half of it -- the rest is buried right into the eaves.
I cannot get nearer to it than about 3 metres (and in any case I don't
want to!).

I put up the ladders to the gutter, and tried to spray between the gaps
in the tiles, where the buggers are getting in, but the spray clearly
doesn't reach: they must have a walkway up to the nest,and the poisonous
foam must be dissipating before hitting any part of the nest.

After a week of trying repeatedly (three cans of Destroyer used!), I've
had to call quits.

My question: will winter kill this nest and all its inhabitants, or am I
going to have to call an expert?

Cheers
John