Universal USB-Home Travel Charger Adapter allows charging at home, in the office or when traveling via a USB cable connection. Regulated voltage allows charging for cell phones, digital cameras, MP3 players, portable media players and other USB-chargeable devices. USB Cable sold separately or use your existing cable.
Good Adapter!, by WhitePhantom
Seems well made and works fine to plug a device with a US plug into a UK power outlet. Just make sure the device accepts 220-240 volt, as this adapter does not convert the voltage.