My daughters (aged 7 and 9)love Jubilee Cadets, come rain or shine they look forward to going to camp during the school holidays. I would highly recommend Jubilee Cadets.
My daughter loves the cadets during the school holiday period. They do both inside and outside activities, depending on the weather to keep the children entertained.
If you are looking for an outdoor and active holiday club this one is the best around. Item for 5 to 11 year olds but it's a bit boring for the oldest ones (but other holiday clubs around are even worse for this). The goats they had this summer were great.