You lot seem to be competing to provide the right answer for life. Allow me to let you into a little secret: unless it's 42, there isn't one! There are a million ways to skin this particular cat, and any one of them may be right for any one of you.
Let's try this:
In general, it's a good idea to get good GCSEs and A-levels.
In general, a degree is a desirable thing.
In general, airlines aren't too specific about what qualifications they require other than an ATPL.
In general, the job market right now isn't wonderful (though it is improving), so it's a good idea to think about how you might earn your daily bread if you don't get a flying job.
In general, life experience is extremely valuable.
In general, generalisations are meaningless.
Do what you feel is right for you, but do it to the best of your ability. Do not assume that anyone else's route is necessarily the right one for you, but respect the experience of those who have gone before you. Learn from other's mistakes so that you don't repeat them. Don't behave as though you know it all when you are just beginning your life.
Apply these principles, and you will be far more likely to achieve what you want. And if you don't achieve that, you will be well placed to survive comfortably in an alternative scenario.