Hi Leonie,
Quite a surprise to see someone from Cornwall in here! I lived in Chacewater (between Truro & Redruth) for a few years.
Many appliances designed for 50Hz will run on 60Hz just fine (so long as you take care of any voltage differences with a transformer).
Radios, computers, chargers for cordless tools, and other similar electronic equipment should have no problems.
You need to be a little more cautious when it comes to mains-driven motors, of which there are several different types.
The types of motors used in the typical blender, food mixer, hair-dryer, power tools, etc. will generally run on the higher frequency without any trouble, although may be slightly less efficient.
However, some motors used in electric clocks, record players, tape recorders, and such like have their speed sychronized to the supply frequency and will run too fast. Modern cassette decks & CD players will be fine in this respect though, because the motors don't run directly from the mains.
