Spear And Jackson Hedge Trimmer these have been tried and tested Model number: S1845CH.
Hedge trimmer features:

18 volt hedge trimmer.
Blade length 45cm - suitable for small size hedges.
Tooth gap 14mm - indicates the maximum diameter the trimmer can cut through.
Safety guard and hand guard.
Laser cut blades.
Blade tip protector.
Quick stop brake.
Soft grip rear handle for comfortable operation.
Dual safety switch.
Electronic brake.