There are reports that Derby-based company Bombardier has lost out on the £1.6bn Thameslink contract putting jobs under threat.
Around 1,400 jobs have already been lost since German firm Siemens was originally announced as the preferred bidder to provide the 1,200 carriages two years ago.
More top news
A pensioner who made neighbours' lives a misery, including displaying images of Miss Piggy to torment an overweight woman, has been jailed.
A newly promoted police officer caused a sensation with local women on Facebook
Headteachers could strike in protest at government plans to force schools to become academies