When Nae Pasaran was shown at Glashow Film Festival they had the film maker and I think two of the retired engineers there for a Q&A. And at Dunoon film festival a coupld of years later the film maker came (i am so bad at remembering names! Felipe Busto?)
If is really interesting to see history that happened in your own lifetime, from the perspective of those who were involved in it!(as opposed yo the political spin put on by the UK establishment at the time).
I found the film very moving..... have seen it several times now. Highly recommend.