Richard Hardy of the Prospect union, which represents engineers, says the bmi takeover will have a particularly bad effect on the East Midlands.
"Over 400 jobs will be lost in the East Midlands alone, over 100 of them high quality engineering jobs.
This is yet another body blow to local economies. Not only will it cause personal hardship and uncertainty for the individuals affected, it will also have a devastating knock-on impact on local businesses, shops and communities. There will be similar, though smaller, impacts in Birmingham, Glasgow and Edinburgh"