Convector Heater - working but issue (Lewes BN7)

This is an electric convector heater. It's working fine; but the outer sheath of the mains cable is damaged (see photos). Someone with basic DIY skills could almost certainly fix this (and as noted it's actually working fine at the moment). However this came from an office and they can't use it in this condition, or with a non-certified repair. (Also I think it probably should have had feet - the fact it doesn't is probably why the cable is like that.)