Well looked after site in the best possible location to explore a world treasure-London of course! Always pleased not to live in London but to visit and avail yourself of the fantastic attractions is unparalleled. As others have said just take a contactless card per person-including children for stress free travel it works very well and is cheap. The bus is convenient but unsurprisingly a little slow however the train from C Palace is clean and quick. Speaking of clean-I've never seen London so tidy-well done to all involved. Visited the Shard which was bit pricey at £25 ea. with advanced booking, but the view.....wonderful and no rush while you are up there. Hope this site continues and doesn't get developed into a housing estate as is possible.