The tail light on the LR3 is only held on by 2 screws and to snap fittings. To remove the light, remove the two screws and then just pull the light straight back. The bulb holders are removed by twisting counter-clockwise and then pulled out of the light housing.
The light bulbs in the tail light of an LR3:
Do you need to find another light for your LR3? Here is a tool that will help you identify the light bulbs: https://www.osram-americas.com/en-us/applications/automotive-lighting-systems/Pages/lrgmain.aspx