Hi Virgil, Mad Jock is absolutely correct, UK degree course fees are up to £9000 per year for full time courses and technical courses such as engineering usually attract the highest prices. I do not believe that you will be able to hold down an airline job and study for a full time degree at the same time.
Also an engineering degree is a massive challenge, I did a BEng part time (1 day at uni per week) while working as an avionics engineer in the military. The military were very supportive (before sending me to Iraq 8 months of the year) but it was still a massive task and I can imagine it would be even more challenging for someone to attempt it who does not have English as a first language (although your English does seem to be excellent). Level 3 Engineering Maths fried my head when it was taught in my mother language, I cannot imagine how it would be for a foreign student.
As I was completing the degree on a part time basis it took 5 years instead of the 3 years that full timers take but it did involve a 12 hour day once a week at the uni and 15 to 20 hours per week at home.
You would probably be much better off getting a full time job in ops, cabin crew, ramp work etc and making yourself known to the airlines that way.
Good luck with whatever you choose to do.