Yes G, the UK one, is generally regarded as the safest.
This showcase also doesn't show that UK sockets have flaps come down on the interior of the socket, so unless the longer and shielded earth pin is pushed in first, the flaps exposing live and neutral won't raise.
The curious thing is that from her perspective, she was only swimming straight the whole time, and only expending energy going straight. It was the 'gifted' energy of the tide that caused the oscillation (from our perspective).
Just struck me as interesting to think that from her point of view she was swimming as straight and as efficiently as was possible.