First was the Falkirk Wheel, a rotating boat lift which has transformed the transfer between the Forth & Clyde and the Union canal from a series of locks taking hours to navigate to a five-minute journey which is also energy-efficient and very, very cool. I took the trip up, round and down while Howard, who had done it before, enjoyed a coffee.
Near the border with England, tourist signs started to appear for the Scottish National Museum of Flight. We hadn't planned to stop here, but it was of course irresistible. Sited at the former RAF East Fortune airfield, it's a well presented and planned collection with lots of gems, including an Islander air ambulance and the Messerschmitt Komet flown by Eric ‘Winkle’ Brown.
The A1, a flat slog lower down the country, is very pleasant here, with sea views and overtaking opportunities. We left it briefly so we could ride the causeway to Lindisfarne. The tide rises to cover the road several times a day, making this a slightly scary prospect even though we carefully checked the tide timetable.
On the way back to the main road we encountered a much more real danger in a level crossing stuck with the gate half open and the red lights flashing. Howard used the telephone at the crossing and was told that the next train wouldn't be for 'a while', but 'I didn't tell you that'. We risked it.
The last stage of the journey was completed in the dark, a tiring slog down a busy motorway where it was hard to keep track of each other. We arrived at 8:30 to very welcome cheese on toast.