Started from home at 4:40am as Capital Ring route follows my home street near the end of section 5.
Finished at 11:15pm after 18 hours and 35 minutes.
Only Crystal Palace Park was closed during my run.
I made an attempt in July 2017 but gave up just after Grove Park, with about 13 miles to go.
I stopped at various convenience stores to buy liquids throughout the day, I stopped at the Prince of Wales pub for a good pint. Spent two 30 minutes at the McDonalds in Brentford in the morning and another 30mn at the McDonalds off the Greenwhich ferry.
Regarding navigation, I only used paper print outs of the section by section maps available on the TFL website. Got lost several times, in particular about 45 minutes in Beckenham Place park.