Lift the boot floor to access the spare wheel well, at the rear of the well, adjacent to the bumper is a plastic cover / guard, this has to be removed to access the TV/video module and the radio module.
To remove the guard, first, remove the plastic cover from around the boot lock, (item 10 here:
https://www.rimmerbros.co.uk/Item--i-GRID001823) this is removed by pulling vertically up, it is just clipped into place - no screws or hidden fixings. Once you have removed this finisher panel, remove the loadspace finisher (item 8 here:
https://www.rimmerbros.co.uk/Item--i-GRID001823) this is secured with four 'scrivets' in the top edge, remove these and the finisher is then free to remove.
You can now access the two modules, the TV / video module is on the left hand side as you look into the boot, the radio module is on the right.
Steve