English Schools Belgium (Brussels)

Hello

I'm thinking of moving the family over here and need to put my 4 year old into school next school year. This will be self financed so I'm looking for a better deal than the expensive Brussels options. My work is in Liege but I can't find a local school that caters to GCSE / IB standards. Anybody know of anything around Liege / Charleroi or anywhere between here and Brussels? Leuven maybe? I can commute to Liege as long as my girl gets a good schooling for an affordable price. If not I'd be glad to accept recommendations in the Brussels area.

Many thanks in advance

Tim