So it turns out that there are a number of ways to get from London to the Boat in Southampton. There's the dedicated Cunard bus, which is guaranteed to get there, there are trains, which are fast but tricky for irregular riders, and there are other, private buses, which could always be blocked by traffic (but on a Sunday?).
Of those private buses, there is a service which does a tour of fucking Stonehenge along the way.
Now, I've always wanted to visit Stonehenge. But it's one of those things which has been totally ruined for me by Eddie Izzard. I know I'd be running around the place, going "Oh, building a henge, are we?"
Eddie Izzard, man. Fucker.
But yeah. Stonehenge. Even though the bus leaves at fucking seven in the morning, this is An Opportunity.