My understanding from the other opinions is that you need parental consent when you are under 16 - It is just not a simple piercing so an amateur or a home procedure would be very risky - I know at 14, 16 seems so far away but my advice is wait to get it done professionally at 16 or work on your parents to try and convince them to allow you to get it done - I personally like Helix piercings but I wouldn't recommend anything risky - So I am sorry it is not what you want to hear but best way forward is for you to be patient.
Okay, I know this isn't what you want to hear, but you probably don't want to get a piercing from someone who will give one to a minor. Piercing it yourself is definitely off the table because cartilage piercings get infected very easily. Plus, even if you do managed to get it pierced, your parents will see it and make you take it out. The best thing you can do is wait. Sorry.
I don't know the rules in England but if the shop is not following them they're not professional, and if they're not professional you could end up looking like a boxer after taking a few hits to the ear.