brake light dull

[marc vectra sri]

As above any idea n/s brake light Is very dull.

[Envy]

Would imagine bulb on its way out mate. Have you replaced it to see what happens or swapped them over to see if the problems follows

[marc vectra sri]

No as only put it in couple weeks ago so must be a duff bulb

[Envy]

Would have thought so or maybe dirty contacts in the light cluster.

I'd swap them over to see. Would only take a few mins

[Big Dave]

As all the bulbs in the rear cluster are the same type (excluding the indicators) just try swapping it for one of the others (as mentioned)