Most of the U.S bought units have wall plugs that range from 110 to 240 all you would need is a conversion from the 2 pin US to 3 pin UK.  If unsure you can buy from Maplin a 110volt to 240volt conversion transformer.  I have one of these and it works without any problems.  Check with supplier of your purchase to confirm voltage range.

It is possible to purchase a transformer from Maplin in the UK that will change the voltage from 240v to 110.  I have USA powerpack and use them here in the UK with the Maplin transformer.