I’ve just been out and tried – it appears that there is a pin through the plate from the leaper’s tail into a locating grommet on the car. The leading edge of the plate is simply bonded to the car with a mastic – I gently prized the plate away from the bonding.
Care – the backing plate is thin and prone to bending
Once I removed my plates I found some rust behind, which will have to be treated before the plate with the leaper is returned to the car.
Hope this helps,