As others have said you have to dismantle this and remove the red plastic pieces to have any chance of fitting a three pin UK plug in. Once that is done it works fine. May try and modify the red plastic bits when I get back to see if it can be made to work as intended.
I use this device to transfer CF cards ( using a usb reader) to SD and then displaying on an iPad. The device works OK provided it is close to the output device. It is small and light, just a pity it does not have it's own CF reader. Transfer speeds are quite slow and can be 'flaky' if too far from the device. Have not tried to use this as a charger yet.