I am visiting London on a Friday/Saturday travelling home Sunday. We are going to the theatre (Wicked) on the Saturday evening and I think we il only have time to really visit two of the London attractions. I wanted to know if the Combi tickets London Eye/Dungeon/Tussauds are valid for one day only? or can you spread them over two days? Like visiting one attraction on the Friday and two on the Saturday, if not is there another way of doing this, barr purchasing them separately Thanks in advance.