Morning all,
I managed to get the light fittings down, both very easy. The video Deck1ng suggested was useful, here's the link:
https://www.youtube.com/watch?v=Y10j2eJrjUI
I actually started at the back rather than the front like in the video as the front on mine was very tight whereas the back came out much easier.
The rear light fitting clips in at the sides and again was very easy to remove.
All the bulbs in both fittings use T10 wedges.
Attached are some photos to help.