I`ve googled this a few times but can only find one other mention of Wellington Bombers being made in Accrington, on this website -
Vickers Wellington - bomber
Part way down there is this reply -
"During WW2 my mother was engaged in production of Wellington Bombers in Accrington, Lancs.
If anyone is interested I have several pictures that I believe are of her and her co-workers taken at the time."
It looks like there are two pages of replies but annoyingly when I click on page two it just reloads page one so don`t know if the photos were ever displayed there, maybe someone else will have better luck with it.