Well found Phil, most interesting !
Here is the man himself at an Ilkley Reunion Trial in Dob Park Splash on the well used AK 222, which is nowadays displayed at Bradford Industrial Museum as 1912, which looks true for the engine, whilst the frame looks more like 1914. There are modifications, including the sensible addition of a front drum brake, as the original bicycle-style caliper brakes would have been useless in the water:-
