Rotherham MP Sarah Champion has backed Tata Steel workers planning to go on strike in South Yorkshire.
Ms Champion said she will support the forthcoming strike if the current dispute over pensions cannot be resolved.
Tata employs more than 2,000 people at its sites in Rotherham and Stocksbridge.
Members of the GMB, UCATT and Community unions have voted in favour of striking, with Unite members voting up until the end of this week.
Ms Champion said: “Strike action should always be a last resort, but in this instance, I believe it is.
“Our local steel workers have tried everything to negotiate with Tata’s bosses over changes to their pension scheme, but nothing constructive has happened.
“For me, this is about treating your workers with fairness. It’s not fair to expect them to work all their lives, pay into a pension scheme on the basis of retiring at 60, and then suddenly be told that they can’t do that now and they have to work another five years. I am hopeful that a deal can be reached before the planned strike, but if not, my support will lie firmly with the workers.”