Greenwich park is the worst I've seen (within running distance of deptford) for complete failure of social distancing, I've had to stop going there because of all the groups of clearly different families hanging out & having a chat, blocking all the crossings.
Strange, I thought Greenwich Park was pretty quiet yesterday, particularly given the nice weather. It was largely dog-walkers, joggers and parents with very young children. Nowhere near as busy as you would normally expect.
Interestingly, the Police were stopping people parking on the roads around the Park, which suggests the problem is not locals (who by and large love and respect the Park), but people who drive in from out of the area.