Sockets directly under light switches? Pros, cons?

You have worries....phew.

Sockets at the top for e.g. a hairdryer and sockets at the bottom for the vacuum cleaner. If you plug the vacuum cleaner into the socket at the top and then "pull" the cable, no one can get past the cable anymore.

Best regards
Sabine

The sockets are there because of the vacuum cleaner. In my opinion, it is enough to have them in the hallways. Bathroom and kitchen excluded. Otherwise, higher ones are suitable near furniture, for example to charge the phone there. I find the ones under the switch unnecessary and ugly. I didn't want any, but unfortunately the electrician didn't read my electrical plans correctly. Now I have a few [emoji20] after all.

Right. But if you have kids around and add those retrofitted things in, it's always a bit fiddly, and B doesn't look so nice. Besides, the plug fits completely into the socket.

It is not VDE compliant.

What is not VDE compliant? Sockets with increased touch protection or subsequent child safety devices?

Retrofit installation of child safety locks. None of the models have VDE approval due to the reduction of the plug-in depth.