Survival of the Fittest
Not a tough ride but a visit to Down House, the home of Charles Darwin. Bring English Heritage cards, otherwise entry costs £10.80 to £13.20. About 16 km - a short ride for a short day.
Meet at Hayes (Kent) station at 10:20. 09:27 train from Cannon Street or 09:37 from Charing Cross.
Colin Wing firstname.lastname@example.org 020 7828 1500