Thanks for all your responses. I guess the "attachment" the customer has developed is due to the fact that he has paid less than 1/2 the UK price. Looking around the house, I noticed other items from the US, powered by transformers, all of which he has managed himself so far.

Looking over the web over the weekend, I have found quite a few UK sites offering transformers to US residents and US armed forces personnel who might require 110V power in the UK, from 50VA to 8KVA, so this kind of requirment can't be that rare - here is the link in case anyone is interested:

http://www.airlinktransformers.com/american-transformers.asp

I'll be calling them next week - it will be ineteresting to know if they can supply the right one.