XC60 B5 2020 Model

The inner tail light on drivers side has been damaged on my Volvo. I have sourced a replacement part and when I look at the part it appears to only be held in by one screw which is easily access from inside the boot. However once this screw is undone the light moves but will not release. Has anyone any experience of replacing the inner tail light. I have tried to access the light from inside the recess for the emergency triangle but it cannot be reached.
Any assistance would be greatly

appreciated