Re: colour me sceptical
Many, many times in the past have I wedged a Euro-type Shuko or two-pin plug into a UK socket, even on occasion using a small screwdriver in the Earth-pin hole to open the socket's internal safety shutters.
Take that, MK electrical safety engineers!
OTOH, I have here in my office now several of those extremely sketchy Chinese-made "will accept any plug from any country" power-strips, and those give me the heebie-jeebies. Arcy-sparky and wibbly-wobbly don't mix with mains voltages.