I thought this link may help anyone who has an allotment for the first year:
http://notjustgreenfingers.wordpress.com/2012/09/03/things-to-do-in-the-kitchen-garden-in-september/
That is useful. I didn't know abut removing leaves from squash. How many can I safely remove? mine are crowding out my leeks.
Just remove the leaves that cover your squashes so the sun can ripen the fruits.