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.
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Many places will stay dry with sunny spells, although isolated showers are possible, especially during the afternoon and evening.
A cloudy start, but sunny intervals developing from the west through the afternoon.
Police investigating missing Madeleine McCann have contacted Australian officials over the discovery of remains in a suitcase, the Met said.