Long-serving Labour backbencher Sir Stuart Bell has died after a short battle with pancreatic cancer, his family announced at the weekend.
The 74-year-old Durham miner's son had been a GMB union member since 1977 and MP for Middlesbrough since 1983.
GMB northern regional secretary Tom Brennan paid tribute to the former shadow trade and industry spokesman, saying: "Sir Stuart Bell was a passionate and tireless advocate for our people.
"He first went to Parliament when Labour was in the wilderness and through sheer tenacity helped in the process of dragging Labour back to office.
"He was a very loyal GMB friend of the northern region and his contribution to our members' lives will be missed but never forgotten.
"Our thoughts are with Sir Stuart's family at this very sad time."