They have been bidding, they proposed a train for Greater Anglia and that train was in First's bid for the franchise. The also tried to bid for crossrail but they didn't have a suitable product. They are currently working on the breeze hydrogen train as well as bidding for HS2.Alstom ? No orders in UK lately.
They also do lots of maintenance, electrification and signalling, they definitely have a presence in the UK even if they haven't won any new trains in the past couple years...