United Kingdom uses 230V, 50Hz with socket and plug Type G.
You may need an adapter while in United Kingdom.
Frequency difference is generally not a problem - almost all items (except some types of clocks) will work on both and you shouldn't worry about it.
If there is a voltage difference between countries, you probably won't need a transformer/converter if you use recent devices and appliances because they all work worldwide automatically.
Sockets & plugs, frequencies and voltages are provided alongside the requirement for the adapter/converter if needed as well as compatibility across socket/plug type, frequency and voltage. Each socket/plug type has associated vector image.
Sockets & plugs category is available in production API version 2.