All courtesy of the Center Parcs magazine:
GLTC: 15% off with CENTERPARCS16, valid until 31/8/16.
JoJo: 10% off and free delivery with CPC61, valid until 30/6/16, not valid on sale, multibuy, gift vouchers or microscooters.
Room to Grow: 5% off first order with ADVENTURE, valid until 31/8/16.
Swimwear365: 20% off first order with SKEP, valid until 30/9/16, not valid on sale or electrical items (why does a swimwear site sell electrical items?).
Puddleducks: 10% off first term fees with CPVL.
Hope these help someone!