I didn't walk, I ran.
I was out of the house at 08.15hrs, drove to Farlington Marshes, Portsmouth and then ran for about 4 miles! Nobody around, its was rather eerie but I felt great, went home, had a shower, then ruined all my effort by eating and drinking too much! Did the same the next morning, but then visited relatives in Basingstoke. I was a bit more restrained this time, got home, within 30 minutes I was in bed (about 20.00hrs) and slept rather well. Today did the same, up at 08.30hrs, running by 9.30.