Doctor Who UNIT Declassified

I have just received my copy of Doctor Who UNIT Declassified, a 114-page whopper from the makers of Doctor Who Magazine, timed to coincide with TV spin-off The War Between the Land and the Sea. 

Among the many treats, it boasts two things by me:

pp. 34-37 "The Private Life of Terrance Dicks"

Many of the classic UNIT stories were overseen by a writer and script editor who drew extensively on his own experience of National Service. 

pp. 76-79 "Chasing Cars"

UNIT was mobile right from the start, with a fleet of vehicles at its disposal. But which models of vehicle, exactly?