JARGON Buster
NPPL
National Private Pilots Licence, A recreational licence for UK pilots. Allows the holder to fly aircraft up to 2000kg mass and up to four seats. It is non-expiring, which means that as long as the holder continues to fly regularly, it is valid for life. 
PPL
Private Pilots Licence, Also a recreational licence, but this allows for a much wider scope of aircraft to be flown. It also allows the holder to fly as pilot on international flights. It is the stepping stone to a career.
CPL
Commercial Pilots Licence. Allows the holder to fly and be paid. The licence by itself is quite basic, so other qualifications are normally added to maximise a pilots employability
solo
The point in training at which the instructor no longer accompanies the student inside the aircraft, but instead watches from the ground. The student is in the aircraft alone.
dual
Training where both student and instructor are in the aircraft.
NOTAMS
Notices to Airmen. A method of distributing safety critical information to pilots. They are checked before each flight.
CAA
Civil Aviation Authority. The governing body and law maker for aviation in the UK.
(A)
Aeroplane