The requirement to wear British parachute wings is:
1 - to have completed the British Military Basic Parachute Course.
2 - serve in a 'parachutist' annotated post on an British Military Unit.
Nowhere does is say in QRs that you must have completed pre-para/P Coy.
To wear the 'lightbulb' you just have to complete the course. For example, at least 1 Admin (Trg) branch Officer has been on No 1 PTS and has qualified for the lightbulb. Getting a place on the course 'because I want the badge' is just not going to happen (unless you are a Saudi Prince...)
The sports courses refered to above do not qualify you for any military badge.
MATZ