My daughter & I are travelling to London July 2008. It is our first time visiting. We have a couple of tours schedule - one outside London -- Bath, Stonehenge etc. and a 1/2 day bus tour of London. We are there for 7 nights. I am trying to figure out whether to buy a Oyster Card (which my travel agent hasn't heard of - but I found online) or to get a 3 day Zone 1 - 2 Travelcard. I'm pretty sure everything we want to see is with zone 1 - 2. We are staying near Russell Square. Any suggestions?