As long as the beam pattern is not affected, it should be OK.
I had a 405 that had a small hole in the lens and it always passed. I covered the hole up with sellotape to seal the headlamp, to stop the silver reflector corroding. It was like that for about 3 years before I got rid of it.
Sorry, I don't know what the problem with the handbrake light is.
Well booked for monday, have to wait and see. Is only a cheap banger but hoping gets through as had zero problems with it at all.
I've owned plenty of cars and the two most reliable have both been Rover K Series engined cars, with the terrible reputation.
Funny how it goes sometimes