I'd argue that the really good thing about the UK plug is 1) the switches in the sockets and 2) that the devices are all well-grounded
There are quite a lot of safety features built in to UK plugs. Other ones I'm aware of are the holes being shuttered until a plug is inserted, and the internal design meaning that if you pull hard enough on the external wire, pulling it out, the internal wires will disconnect in a safe order.