Just a smidge longer at 52.7k [or 53 if you wobble too much], Only 240 mtrs climbing so its a nice flat one. Boxies are shutting at 12 due to the bank holiday, but I don't see that as a problem.
About Sunday morning rides
A pleasant Sunday morning ride, at a modest pace and in good company every other Sunday. Various start points.
This article describes what you should consider bringing with you.