Great fun riding the Tube, but you can have too much of a good thing. I think we have seen more undergound of London than above ground.
Like when we were taking our luggage into Liverpool St Stn to locker it, so we could go to the Tate Modern. Train breakdown 5 stations away meant lugging our gear up and down endless escalators, stairs and trains to work around the blockage by using a different route.
But what a miracle it was to be able to have that option! Eventually took us 2 buses, 5 trains, 20 escalators, 2km of walking and 3 hours to get to the art gallery.
Met Patch Lilley and Suz for a drink before spending 2-3 hours visiting Level 5. Oh well, will have to go back for the other 4 levels another trip.