The name is a reference to the fact they will claim to have practical experience, but it always seems to be so long ago (giving them an excuse for getting facts wrong).
Usually from a working class background, and often located in the north of england (although many still from the united states), and generally in the upper qaurtile of the age range. Adored by pseudo-intellectuals and poser anarchists alike. Likely to either be very athiest, or deeply christian. Openly homophobic or homosexual.