Well, after much research I decided to invest in the Work sharp knife sharpener. £87 from Amazon. It arrived but had a European or US plug despite the fact that it was sent from a depot in Scotland to an address in Norfolk! Sent it back; new one arrived today, guess what? Exactly the same. How can a business care so little? Looks like I better get a refund this time and buy it from Heinnie Haynes like I should have in the first place.