Opsguy10
Was in the same situ approx 5 years ago at a handling company. Took it on myself to complete an NVQ level 4 in Management studies at night school.
Did not know what to expect when I started, but really enjoyed the course and learnt alot. All to do with your work and development with no exams at the end. Loads of paperwork and writting, but worth while as got Ops Manager 3 months after starting and never looked back.
To be honest, I would keep away from specialised subjects as one day you may need general management qualifications and the aviation industry is not the most robust at this time.
Good Luck in what ever you do.
Ta
GG'der