Though communication is an essential part of human behaviour, the Royal Guard in front of Buckingham Palace is banned from interaction and unsolicited movement. He appears like a robot. I assume he must need to communicate and I imagine him pressing secret buttons in his black boots, imperceptibly transmitting Morse Code. But this precision manoeuvre must be practised beforehand; he uses this training device to learn broadcasting Morse Code with his toes. Two buttons for dit and dah are operated using the toes. A display behind the two-way mirror allows spell-checking and the mirror helps him maintain an unflinching facial expression.