With an extended reach hedge trimmer you will be able to make short work of those taller hard to reach areas of overgrowth. Ovoid the use of ladders and the accidents that historically go with using them.
The choices in my top five selection include mains electric models and battery models which are becoming more popular every day. They will allow you to work anywhere in the garden completely free from having to work close to a mains outlet. A whole lot safer as well with no cord to cut through.
Some folk feel that using this type of hedge cutter can be tiring. So I would recommend using a harness which will take most of the weight of your arms. Makes life just that bit easier.
I have added a couple of 2-in-1 versions to the end of my list which would suit those with just a little high work to do. These come with one version for tall hedges and another for normal height hedging.
Browse my selection below.
Extended Reach 40V Li-Ion Battery Powered Hedge Trimmer
Hedge Trimmer With a Useable Extended Length of 6-1/2 Feet Will Reach a Height of 10 Feet
Extended Reach Multi-Angle Corded Hedge Trimmer
18-Inch Extended Reach 2-in-1 Hedge Trimmer
Hedge Trimmer With 2 in 1 Design to Use Either Conventional or Extended Version to Reach Tall Hedges