saturdays: 

wimbledon 1st in month - wimbledon park first school, havana road, sw19

twickenham 2nd in month - holly road car park, off king street, tw1

ealing 3rd in month - leeland road, west ealing, w13

turnham green 4th in month belmont primary school, chiswick, w4

sundays: 

queens park 1st & 3rd in month - salusbury primary school, salusbury road