Hi Steve,Your Freelander is one of the 'LE' (Limited Edition) vehicles and as such would not have been used on the G4 Challenge. The Freelanders were available as '03 and '53 registrations alongside the Discovery 2 and Defender, though they were termed Kalahari.
The club also caters for the G4 LE vehicles and have a register of those that we know about, though we do not have the level of information on them as we have on the Challenge vehicles.
Membership details for the club are on the club home page.