A 5.5 mile / 8.5 km walk around Shamley Green.
I wanted a synonym for walk starting with a B. Bounce, Bimble and Bumble were candidates, but sounded wrong. So I've gone with "Bipedal-motion". This implies you need two feet to do the walk, which is true. Handicapped and less agile folk should be aware that there are stiles and steep steps on this circuit.
(Note that this is the second SGB 08, the original/first SGB 08 has been renamed as later in the series.)