That's a very small attendance for a park run, I can tell you are not close to any towns. The Burnley one is always over 300 sometimes 400.
It seriously looks like winter down there, its nice and bright here for a change. I just cut all the grass and deserve a cup of tea now :)
They seem to vary a lot. Bigger towns will get more. Letchworth is fairly small and there are others fairly nearby. It's raining steadily now.