Regardless of which European standards are being used, they're only safe if they're correctly implemented and inspected. I would go as far as saying that in general all of the European systems that I've ever seen are extremely safe once they are implemented properly and to the appropriate codes. UK, Ireland, France, Germany, Scandinavian, Dutch, Belgian, Spanish etc all work very safely.
I get the impression that while they take earthing seriously now in contential europe that they got arround to doing so much much later than we brits did. Afaict even in "fixer upper" properties in the uk it is pretty unusual to find socket circuits without an earth.
It's largely because the old BS546 system was replaced by something totally incompatible. It's easy to recognise an old UK installation because the plugs don't fit.
On the continent the old obsolete sockets were still able to accept modern plugs so they stuck around for a lot longer as people simply didn't bother upgrading. BS546 included a non-grounded 2-pin socket configuration, although it wasn't widely used after the 1950s. The current UK shaver plug and socket is based on it. It had shorter stubbier pins than modern European plugs, but was otherwise very similar the pin spacing etc is the same.
What I have come across in both the UK and in Ireland is very old installations with new sockets fitted i.e. 1930s wiring that has been 'updated'. One such installation had some sockets which had no earth wires connected up.
You'd be amazed at the scary stuff you can find in some old houses that haven't had a visit from a sparks since the 1940s/50s. While most of us don't come across them in our day-to-day lives they do exist. We moved into an old place which had been neglected for decades and it's amazing that it hadn't fried someone!
Also, there are many UK practices that would be frowned upon in most continental European countries (particularly Northern Europe / Scandinavia) where the rules can be pretty strict.
E.g. the use of unsheathed thin earth wires i.e. the type you find in normal UK 'twin + earth" wiring. In a fault situation where there is no RCD that wire would need to be capable of safely carrying as much juice as the live i.e. up to 32Amps. However, in most instances it wouldn't be able to do that.
The use of ring circuits would raise a lot of electricans eyebrows too. It's questionable whether they're actually very safe. Depending on how the sockets are spread along the ring you can actually end up overloading it.
E.g. if most of the load is near one side of the ring the power will be mostly drawn along one side. This can result in hot wires!
It's a problem in older UK kitchens which have been upgraded to include a heap of new appliances e.g. a kitchen that sits on a ring circuit might have only been designed to cope with an electric kettle and many be a washing machine. This may now have a dishwasher, kettle, george forman grill, microwave (with combination oven), washing machine, tumble dryer etc all being fed by the same ring and all located on the same point in that ring.
The non-compulsary use of RCDs is also a bit strange in the UK. E.g. in the Republic of Ireland they've been manditory since late 1979.
Again, I'm not saying that continental practices are perfect, far from it. It's just that EVERY system has its good and bad points. I think really we need to be moving towards a harmonised Europe-wide set of electrical practices that take the best from all the systems and produce a really good safe common set of wiring practices. In general though, they're all very safe systems IF they're implemented correctly and according to their respective rules.
I would rather see something like a modern neat socket outlet that had the advantages of both the UK and Schuko systems and a wiring system that took the best of the European regulations and combined them together.
I suppose we are gradually moving towards something like that though. Albeit in a very slow and ad hoc way.