Beagle Pup has the fuel cock on the floor in front of the seat squab. Tapered pointy thing on top. Point it in the direction of the tank you want or forward for both, rearward for off. Needless to say I'd switched form "Left" to "Both" but had ended up with it pointing backwards rather than forwards.
One of the reasons not to change tanks near the ground or immediately before take-off or landing.
Yes, I visited EMUAS where I used to instruct and asked where "my" Bulldog was. The ground crew chief led me by the arm to a pile of metal at the back of the hangar.... a AEF pilot got the fuel selection badly wrong and the engine stopped during the climb.
