Trim Evergreen Hedges.

Yew, privet, Lonicero nitida and box all benefit from a trim in early summer to keep them in shape.

Use shears on smaller hedges and hedge trimmers on larger hedges.

If you don't own an electric edge trimmer but are contemplating buying on, I can tell you that an independent test laboratory recommend the following five machines:

Black & Decker 1850L
Black & Decker GTC3655L
Bosch AHS  52 ACCU
Bosch AHS 54-20Li
Bosch AHS 52 Li