A RARE EXAMPLE OF A CIVIL DEFENCE P MARKED HELMET

A GOOD WWII BLACK HELMET WHICH HAS A WHITE LETTER P TO THE FRONT 

P IS AN UNKOWN  MARKING I SENT AN EMAIL TO ADRIAN BLAKE WHO RELIED WITHY THIS : The 2 single "P" roles were "Principal" (who had something to do with the MoH in London) and "Plotter" who worked on maps etc in the Control Rooms - but, as usual, I've not seen anything to say they had marked helmets I will ad that it could be provisions , property or even personal