Why would Euromanx get rid of two 5-6 year old Dash 8s 37 / 50 seats and replace then with more expensve to operate Dornier 328s 30 seats.
The recent IOM airport stats show Euromanx doing better on Manchester even against Bacons latest cheap fares.
A shiny new Dash 8 400 78 seats does out perform a Dash 8 300 and a 146 / RJ but a Dash 8 400 on 5 returns a day to Manchester is 780 seats against Bacons 500 a lot of extra seats to fill.
With the ATC issues from IOM MAN IOM the speed of the aircraft does not really make a difference.
A Dash 8 400 costs about $16m and it needs paying for, soo full flights and high yield will be required.
Dash 8 400 will be an ideal aircraft for LGW.