Tata Steel has announced that proposed cuts will affect mainly management and administrative roles at sites in Scunthorpe, Teesside and Workington.
David Hulse, national officer of the GMB union, said the news had been a surprise.
"This terrible news has come straight out of the blue. It is a shock to the workforces in Scunthorpe, Workington and Teesside.
"GMB is bitterly disappointed as earlier this year we saw 1,000 people leave the company and everyone involved has worked hard to make all-round improvements.
"GMB will insist on no compulsory redundancies and to bring the number of job losses down."
More top news
The climber fell above Blea Water in the Lake District while out with a colleague, who were reportedly both well prepared.
Brougham Old Bridge near Penrith became so badly damaged during the 2015 storm that residents feared it would completely collapse.
Deputy First Minister says new curriculum inform based on teachers judgement is "reliable".