I imagine that many members of the society have seen this film footage, but I thought I would post a link for those who may have not. I found this link on the WW&F Ry website, here in the states.
Jeff S.
https://www.britishrailways.tv/train-videos/2013-09/archive-film-of-the-last-days-of-the-southwold-railway-in-1929/