Leaking Sunroof

[Goldhillman]

I have a 2020 Elddis Affinity 520 which has developed a leak from the large skylight which runs most of the length of the lounge. We are expecting the dealer to sort it out but this is the third leak in five years. I would like to remove the large plastic surround to take a closer look to identify where the ingress is taking place but can’t see any obvious fixing points. Does anyone know how to remove the surround?