If you look at 2019 results, which was the last set of 'normal' results to give an idea of the airline, they carried 34m + passengers, load factor of 92.8% and a profit of €295m, from 114 aircraft. That's not a bad set of results to be honest ... and a healthy balance sheet going into the COVID crisis - hardly one of the worst performing airlines arguably one of the better performing ones ....
I think it's a great move and good fir for the Doncaster market. Given they are now number 1 at LTN, I think this could be a very successful venture for them.