Abellio, one of the 3 remaining bidders for the Wales rail franchise (which obviously includes the Metro) had partnered with Carillion for the construction aspects of their bid. They'll have to move quickly to find another partner I'd assume, or their bid may well be in trouble.
Wales Online wrote:Carillion is the construction partner to Dutch transport giant Abellio in its bids build the next phase of the Metro in south Wales with electrification of the Valleys Lines and the running of the next Wales & Borders rail franchise from October.
Abellio's bid was submitted to the Welsh Government's transport body, Transport for Wales, along with those from MTR and KeolisAmey, before Christmas.