You must do it, it took me back to all the old lovely tourist sites I have not seen since a kid on a school trip as we only live 20min train ride away, we kind of take London for granted, I was a bit worried about it going into the Thames as I get bad sickness but luckily the Thames was quite calm.

The people that do the tour come out with some weird facts about buildings that you wouldn't usually get on the old bus tours