Chepstow's Mabey Bridge turbine workers 'doing good job'
The Welsh government said it is "extremely disappointing" that a deal has not been struck to take over a Monmouthshire renewable energy factory and its workforce.
Mabey Bridge's (MB) £38m turbine tower-building plant in Chepstow has closed after four years.
Simec - new owners of Uskmouth power station - said it is prepared to buy the plant and take on the 120 workers.
But MB said it failed to find a viable buyer despite "exhaustive efforts".
Workers finishing their last shift on Wednesday expressed their disappointment, while earlier, James Busche, chief executive of Simec, was asked about his hopes for a deal.