Earlier quoted context omitted.
They're ugly as hell, and insanely painful if you tread on them, but UK plugs are a bastion of good engineering. Things like not being able to stick things into the line/neutral holes unless the ground pin (which is longer) is inserted make them very safe, and the plastic lower part of the line/neutral pins to stop you accidentally touching something that will have current running through it until the plug is safely…
They are however no safer than Schuko plugs, which are significantly less annoying.
Being able to plug them in ungrounded Euro sockets is handy, but also makes them less safe.