Might be worth writing to CAA - it may take until you are 17 to get an answer, they're not all that fast or clear sometimes - but they *may* permit you to do everything then just date licence issue from your 17th birthday?
The other thing to shoot for is a first solo on your 16th. You wouldn't be the first person to do this, but it would certainly make you a member of a very small and exclusive club.
G