Thanks for the replies guys. Sorry I couldn't respond sooner, just started a new course at college so things have been hectic.
Anyway, the car got through the MOT on Monday with no problems.
A headlight connector had melted and a bulb had blown, but I managed to replace it with one off a Primera the night before the test and it got through fine.
As for the rattling noise, it was a heat shield. It got through the MOT ok, but quick fit quoted me £65 to fit a new one.......I'll just take the damn thing off completely when I get around to it.
Thanks for the replies anyway.