I seem to have a fault with brake lights, they work except the high level.
Anybody give me a clue as to how I remove it without breaking?

+1 i had this problem and was the wiring that had split.

I would go back and remove all the tape insulation and have another look, this is a common problem and the cause is normally the wires! You are looking on the pass side near the boot hinge right?

Failing that to rmeove and replace you need to undo the connector and unscrew the two screws on either end of the high level light (just look at it and the screw heads are obvious)

Then it should just pull out with the plastic surrounding trim.

http://www.mgf.ultimatemg.com/group2/lighting/hlbl...

Try this link. The screws are visible from the outside of the car and are at the end of the light itself.

Mine were broken about 10 mm inside the main loom. I checked it out by spiking the wires and using a meter. I crimped a join in and did not retape the loom so the wires can flex.
Ps threads on The T bar and MGF Register frums about this. I put pics of my repair on one of them. It looks untidy, but the wires are free to move.

The link and instructions posted are for an MGF, not a MG TF, hence why yours looks different.

Have you stripped the tape off right back to where the boot lid wiring joins the main loom?
From my experience this is where the wiring most commonly breaks, rather then next to the hinge itself.
I will look up the wiring colours when I get home (don’t have my manual to hand).

The supply for the light is green/purple, and the earth black.