Grainger is right... No point embarking on a CPL course unless you can obtain a class 1 medical. Even if you think everything is ok, best be on the safe side.
That said, the class 1 is more expensive than the class 2 so only get a class 1 if you are considering the CPL route.
Can we just clear up whether you are talking fixed wing or rotary? Obviously this has a bearing on the types of jobs available.
As far as the military route is concerned, you need to be of a certain educational standard and age:
RAF - British citizen, Under 23 with 5 GCSE's (grade a-c inc. maths & english) and 2 A Levels
Army Air Corps - British Citizen, Under 26 with 5 GCSE's and 140 UCAS tariff points at A/AS level
Royal Navy - As AAC, not sure about the age limit though.
Dare I say, for someone talking about splashing out the cash for a CPL, you don't seem to have done much homework
