Standard voltage in England is 240 volts. The standard hertz in England is 50 hertz. England also has a distinct plug type that is unique to the United Kingdom.
When traveling in England, a power adapter is necessary to plug in electrical devices from the United States. The adapter converts the voltage and allows the plug from the device to fit in the outlet. In England, the plug types are not the typical two-prong and three-prong outlets that are used in the United States. Instead, England uses a three-pronged outlet with flat openings. Both England and Ireland use this outlet type, and the outlet type differs from other countries in Europe.