Richard Hardy of the Prospect union, which represents engineers, said that 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.
Talks between the unions and British Airways on BMI job losses will start tomorrow morning. BMI routes, livery and the schedule will survive until the end of summer. British Airways aims to incorporate everything, including painting 25 planes, by the autumn.
International Airlines Group (IAG) - the parent company of British Airways - will be forced to give up a number of take-off and landing slots from Heathrow, as part of the bmi takeover. Routes to Nice, Cairo, Moscow and Edinburgh will be affected.
On gaining EC approval for the deal, IAG chief executive Willie Walsh said it was "great news for Britain" and also for British business and consumers.
The takeover has been bitterly opposed by Sir Richard Branson's airline, Virgin Atlantic, which has complained that the deal gives BA an over-strong presence at Heathrow.