Delighted to see bmi has taken the initiative from Go.
As to the future, I should have thought that bmi has lower costs already out of EMA because their infrastructure is already in place and proven. That includes engineering and admin. Let's see how much it costs Go in handling fees and support when the summer trade slackens off and the bills still need to be paid.
Perhaps "low-cost" wages are not such problem; you will have a number of Boeing qualified pilots who will quite happily accept the EMA base and sector pay in lieu of London Weighting and the perpetual grind round the M25.
Good luck to bmi and, for the sake of the (rapidly reducing!) 109, a success.