I work work at East Midlands and today I saw G-MIDZ in the hybrid colour scheme. Basically it was in the old colours with BMI on the tail and along the fuselage, it looked quite good and I got some good pictures. It then ferried to LHR!
I reckon because MIDZ is fairly new, it would obviously cost a lot to re-paint and so this will do until it is ready to re-paint in the new colours. I have heard that the Fokkers and Embraers will be painted like this too.