That connector has a 'pin side' and a 'socket side'. It is only safe if you connect 'pin side' to the hedgetrimmer and 'socket side' to the mains.
http://www.kentonline.co.uk/sittingbourne/news/warning-after-womans-lawn-mowin-a18360/
You might be able to take the hedgetrimmer apart and wire the longer cable back in it.
@sausagefingers started
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That connector has a 'pin side' and a 'socket side'.
It is only safe if you connect 'pin side' to the hedgetrimmer
and 'socket side' to the mains.
http://www.kentonline.co.uk/sittingbourne/news/warning-after-womans-lawn-mowin-a18360/
You might be able to take the hedgetrimmer apart and wire the longer cable back in it.