Bombers Williams Control Plate Dressage is a sweet iron bit good for a horse who may travel head high and nose out. 

The cheekpiece will bring the head down, whilst the control plate dressage lays a flat plate over the tongue and will bring the chin in. 

Recommend adding 10mm to the size of your loose ring snaffle, also recommend adding bit guards as this cheekpiece may pinch the outter lip.