Help! Stuck dismantling read number plate light mounting

[tonupkid]

Hi Guys & Girls

I'm getting in a bit of a pickle trying to remove the plastic strip from the outside of boot of my D3. The one that contains the number plate lights.
I've taken off the boot lid lining, and removed nuts that seem to be behind the part I want to get off, but it's still seems as firmly attached as ever.

Is there a 'how too' that could direct my efforts please???

I realise there is a resource somewhere in the forum, but can't find it. In 7.5 years of ownership this is my first foray, so please be kind. I'm getting there bit by bit Any help much appreciated. Thanks