I will be in London for a weekend next month and have one day to do some sightseeing. Having never been to the Tate Britain or Modern, I am making plans to see at least one of them. I prefer the "classical" art of the TB more than modern art, however, if we are up for it, maybe we will do both. I've heard there is a boat that connects the two. Is this true and has anyone done that? I know this is a matter of taste, but if you have been to both and like both periods equally, which museum did you prefer?