Brake light needed replacing on Sportback today, what a pain and awful design!
Followed instructions in book but removing the light from the bodywork is difficult, no wonder they warn you in the manual you may damage the paintwork and should take it to a dealer!
Looked up the diagrams previously kindly posted by Dave Robinson and they show it on a 3 door which looks easier as the lights don't wrap around the side so much. On the Sportback they are shaped more and go around the side of the car and are held in place (in addition to the screw) by 2 tightly fitting nipples that need prizing loose which is very difficult.
Just wondering if Dave could post up whatever diagrams he has for Sportback removal of the rear brake lights as if they are different to what is in the manual it may help others.
I succeeded in the end without causing any damage, however is not very easy so don't attempt if you are short tempered or it is very cold out!