I bought my train tickets online this week (advance tickets) which worked out considerably cheaper than getitng them at the station on the day. However I normally add our tube travel to our train tickets and I haven't been able to do this online.
We are in London for one night (two days) and I don't know what the cheapest way to get our tube tickets is? We're just doing the sightseeing so I think we only need zone 1. Can anyone help please?