Just found these details online...
from http://westcroydonforum.wordpress.com/2012/08/23/west-croydon-festival-of-cultures-sunday-23rd-september-and-week/
~ Stage show
~ Carnival parade
~ Steel bands
~ Children’s entertainments
~ Martial arts demonstration
~ Traditional dancing from around the world
~ Jazz singers
~ Arts & crafts
~ Stalls
~ Fairground rides
~ Barbecue
~ Food & drinks
So yeah, looks like some potentially interesting things to photograph.
Not sure if I'll be able to make it myself, but thought I'd share the details anyway.