Diary and Notes by George Orwell on his vist to Wigan in February 1936.
Also a video of a BBC Arena film made in 1983
Containing data on Health, Employment & Housing in Wigan
BBC Arena film - Road to Wigan Pier
Some great interviews with Wigan folk that met Orwell, also gives a 1983 window into Wigan life when the film was made.
Some good archive material.
The Wigan interest starts after 15 mins, although first 15 mins is interesting