I have a dual socket that has plugged into it a shaver adaptor to power a foreign lamp and various combinations of USB charging. I was thinking of buying a 13A multifunction socket from Amazon (can take UK 3-pin, 2 pin shaver, USB etc) but notice that reputable sellers like BG don't have anything like that in their range. Is this a stunningly obvious clue that these things are too risky? I'm a complete amateur with electrics but understand the basics (I think). I'd use a socket tester and multimeter on the install however suspect this isn't a good idea. Advice please.