There are so many passes to choose from!
Would a rail pass be the best option? And, is it best to buy in advance or after arriving (Eurostar).
My plans are below (1 person (nonstudent), 2nd class ):
October:
Land at LHR
Go to Bath (on bus)
Bath to London (train?)
London to Paris and back (Eurostar) - for a Rick Steves tour! : - )
London to LHR (underground, I assume...)
Thanks very much!