No doubt someone will correct me if I'm wrong on anything.
From memory, they are basically correct.
In the "old" days (just a few years ago) you had to Earth and Cross Bond just about everything, but the regulations changed on I think the 17th edition as you now have to use ELCB (Earth Leakage Circuit Breakers) so if there was a problem it should cut all power.
The bathroom (in fact all "wet" areas) should be on a 30ma RCD anyway, so as long as the rest of it is all up to code, you're fine.
Thanks for that, I thought it was strange, as it was connected to a earth strap behind new wall, and from there it was connected to a big thick earth wire, that then goes up trunking, but no way to get to it now as its all been boarded over and plastered, I thought it should be connected for a reason, as I did not think it was there to decorate bathroom lol, but as you say things have changed and are changing all the time.