We've traveled to the UK a few times. While there, I've been impressed at the electrical wall plugs. They're very nicely engineered. Each of them have a small switch, holes spaced widely and, large holes and the electrical contacts are deep inside. This requires larger and longer "pins". The standard UK electrical outlet as quite child safe. I've seen versions that have spring loaded latches that make them nearly child proof. I've never seen anything as nice in the US. Our plugs seem so weak in comparison. I find the US plugs I often need to bend the plug blades so they'll stay in the plug. So many time I need to push in all the plugs around my office and especially under my desk where my feet seem to bump them.
In the UK, you flip the switch up for off, down for on. I wonder why we do this the opposite. I don't see an advantage either way.