Hull East MP Karl Turner says Seven Seas staff are facing an "extremely anxious Christmas" after the firm announced it is still planning to leave Hull.
The historic Hull firm said earlier this year it plans to transfer its commercial operations to London.
Yesterday, it issued a statement confirming it still planned to press ahead with the move. It could mean about 250 people losing their jobs. Mr Turner is among politicians and unions who have urged the company to stay in Hull. He said: "This is deeply disappointing news, but no surprise."It is very concerning this announcement comes before the end of the 90-day consultation process.
"I think this shows Seven Seas had no intention of staying in Hull and had made its mind up to leave before the consultations even started."
Seven Seas managing director John Redman said: "We are making this announcement now because staff have made it very clear they want clarity on the future of the business before the Christmas holidays.
"The consultation process to date has been thorough and we have been listening carefully to what all groups of staff have been telling us.
"However, nothing has been put forward that changes the company's view that outsourcing manufacturing and relocating commercial operations offer the best chance of future success for Seven Seas."
The first phase of the consultation process with staff is now concluding.
Seven Seas will now move ahead with the second stage of consultation on its plans for what it is calling a "phased shutdown" of the Hull site over the next two to three years.
Mr Turner said: "Local stakeholders have bent over backwards to offer support and to develop an alternative plan to leaving the city, but this help has been ignored.
"Seven Seas built its reputation on the back of Hull and is now baling out in our hour of need. This terrible news comes on the same day as we see the doors of Comet close in Hull and the Government announces further erosion of employment rights, wanting to reduce the 90-day consultation process to 45 days.
"When Ed Miliband talked about predatory capitalism two years ago, this is exactly what he meant."
The latest announcement comes just two weeks after MPs wrote a letter to the Mail saying the firm's withdrawal from the region would be "the wrong decision at the wrong time".
In November, Seven Seas came under fire after it invited workers to a free Christmas party just days after announcing the potential job losses.
Workers and unions hit out at the firm when it sent out invitations to the party at Willerby Manor one week after announcing plans to axe its plant in Hull.