Thanks for all your help.
There were no plastic clips on the car, the rubber lugs appear to have been pushed directly through a "rubberised" washer type arrangement which was very tough to remove.
See the before pics.


The only way to make progress was to attack it with a razor blade, cutting off the lugs on the inside of the panel and then trying to remove as much as possible of the rubber on the outside of the car. Difficult to do without scatching the paintwork too much (see after pic).


Ideally I would have removed more rubber, but went ahead and fixed the clips and badge in place. It is not as snug a fit against the body as I would have liked but we will see how long it lasts.
Neil