There are some records for Ordnance Factories at the National Archives - might be worth a try? This is a link to available records about the Bridgwater site for that time. A lot of the records are technical but an enquiry at Kew might be profitable.
Submitted by daveerasmus on Sat, 06/04/2019 - 19:48
The National Archives also has a document called The History of the Royal Ordnance Factory Bridgwater (ROF37) 1940-45. Not available online unfortunately. A simple Google search should throw up the link.