Thanks for the tip about getting a special voltage converter for
heating appliances - I searched around and I could get a travel one
from the USA designed to convert the voltage for hairdryers/curling
tongs/irons etc to be used in the UK. They cost around £16-20
including postage - so I think I will get one of these as the waffle
maker was worth much more than this.

Just make sure it has adequate capacity.