Ben,
Ignore the previous posters, they have no idea.
Yes, if the Navy says no, then you can apply to the Army and RAF.
You can join both to be a Pilot from the outset.
Whilst technically in the FAA you are a naval officer first, and in the Army you are an Army officer first, it makes no difference to your life.I am not qualified to drive a ship!
Anyway, in the RAF you are a big girls blouse first, pilot second.