the original book of this be set in the 1950s but that would not do for the tv series because most people watch for the 1930s style . ironically the tube train near the end be a 1950s train paint to look like a 1930s train so the underground can play at that game too . hang the storyline on a plot about the jarrow march be feeble but the 50 version have student who be begin to think about the world around them so i suppose make them think about the poverty of the marcher be much the same thing . all the stuff about japp have to cater for himself be weak too but they have to put something in to fill the time . this would have make a decent half hour show or they could have film the book and make it a well long show . it be obvious this episode be a victim of style over content .