The year/date a bike is registered is irrelevant to it's 'MODEL YEAR'!
Both myself & a friend have the exact same bike & there both on '02' plates, they are clearly just 'LATE' registered bikes.
To identify the model year there should be a small white sticker on the rear of the frame were the the seat catch is which will start 5LV-?? The 5LV is the 01-03 model the later bikes will start 1C2-?? Im fairly certain the later 1C2's DONT have a headlight switch in the right hand switchgear (there permanently on) and they had a variation of different colour schemes & black frames.