From immediate memory both Piper Colt and Maule, (and many others), have interconnected rudder and ailerons. Application of either will correspond with a reaction not fully anticipated in the alleged CAsA advice. I could go on with evidence of an interconnection being tampered with on a Maule but it's all written up in "The Phelan Papers". I think the advice is sound for the Sopwith Camel though and even then the engine needs to have the fuel turned off. 'Blipping" tends to exaggerate the situation.