Need to purchase a hedge trimmer to deal with a fairly large hedge
boundary - I will be working off ladders at some points and the hedge is
between 50 and 100 cm thick in places.

I would appreciate any recommendations on what to buy (I have already
discounted what appear to be practically useless rechargeable trimmers)...

petrol?
electric?
blade length?
anything else I should know or care about?
anybody used a trimmer that is fantastic they could recommend?

I would pay up to about £100 to buy one.

cheers for any advice,
g.