I pass the statue memorial to Capt Chavasse most days. It displays him rescuing a casualty in a manner have not seen before, or been trained to do. The casualty is behind, the Captain has his right hand over his right shoulder grasping the right hand/wrist of the casualty, whilst the Captain's left hand is under the casualty's left armpit. It looks like quite an uncomfortable and cumbersome manoeuvre. Is this still a taught practice?