Don't get too bogged down with the A levels etc, most modern apprenticeships rerquire 5 GCSE's at grade C or above to include Maths, English and 1 science subject so I dont think A levels or degrees will help.
If the GCSE's are no problem then I can agree with the others that hand skills are almost as important as the academics! Volunteer work with the local airfield maintenance organisation or any other engineering/mechanical job that will allow some hands on experience.
Where about's are you based and it might help some of us give you some pointers?
Monarch intake is shut for this year and will reopen around Feb Next year, one of the best apprenticeships you could be a part of!