The Department for Transport has confirmed that Bombardier has lost out on the £1.6bn contract to Siemens.
It also confirmed the deal is in the Alcatel standstill period and will not be formally announced for ten days.
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Fog patches and extensive low cloud at first will steadily lift and clear.
A murky start with mist and fog then gradually clearing, although some eastern coastal districts may remain cloudier.
Isolated showers should die out through the evening to leave a dry remainder of the night.