Earth Pin has a thicker, longer, unibody design. When you try to plug the outlet into a plug, the grounding part first enters the plug and opens the covers on the outlet to allow the other two live leads to enter. Child protection is standard in British type sockets and its application is much easier with this ingenious design.
On the other hand, the Live and Neutral pins are not monolithic, most of them are isolated, so that when the socket is half-plugged, the ends through which the electricity passes are not exposed.
The real safety starts inside the socket, inside the socket lies a detail that is not standard in any other socket, the fuse. There is a fuse inside the British type sockets, this is vital in extension cables as well as electronic devices. If the extension cables and the cables used in the extended multiple sockets are not strong enough to carry the current drawn by your device, they get hot and can spark a fire under suitable conditions. The YouTube channel Technology Connections considers this situation as the weakest link in the US electricity system. There are no British plugs or a fuse solution like theirs in the US either.
If you are strong enough and pull the cable from this socket by hanging, first the phase cable, then the neutral cable and finally the ground cable will come out. This is really genius.
The weight balance of British plugs allows them to fall on their backs, although not always, to a great extent. In this way, if you drop the socket on a wet floor, you will probably not be electrocuted because the plastic part will come to the floor.