MG GS Handbook page 264

Rear Interior Lamp
1 Use a small flat-bladed screwdriver to gently prise
the lens from the light unit.
2 Pull the bulb from its mounting to remove.
Installation of the bulb is a reversal of the removal process.
When installing the lens, locate the two prongs at the front
of the lens and then carefully flex the lens to locate the two
prongs at the rear of the lens into the light unit. Push the
lens upwards until it 'clicks' into position.
250
Emergency Information
Boot Lamp and Glove Box Lamp
1 Insert a small flat-bladed screwdriver into the indent
2 Pull the bulb to remove.
Installation of the bulb is a reversal of the removal process.
on one of the narrow sides of the lens (see arrow
in illustration) and carefully press the unit from its
location.