QUOTE(Ensemble @ Nov 1 2006, 09:48 AM)

I really really lack confidence when I have to sing anything so obviously aural parts of exams are a nighmare

I would love be able to just confidently hold a simple tune - I'm not asking to be a fantastic opera singer or anything but I can't even join in singing Happy birthday for fear of being out of tune!!
Eureka! A soulmate!
My G1 examiner wrote on the exam sheet that I "varied in pitch quite considerably"

But I still passed with a Merit so I don't think you need worry unduly.
A couple of years ago I went on a weekend course called "Singing for the Tone Deaf". It was brilliant! All the members of the course came out with so much confidence that we all wanted to go and join our nearest choir
What I learnt on that course, apart from confidence, is that some people have a more limited range than others. I think you can extend your range with practice, but you need to give it time and commitment.
Incidentally, one of the men on the course who thought he was "tone deaf" turned out to have a truly magnificent deep bass voice. But when singing in his church congregation, he'd been trying to match his pitch to the people around him, which obviously didn't work. He got the confidence to sing at his own level, and it sounded wonderful when put in harmony, rather than competing, with the higher pitches.
There's been another thread recently
Grade 8 Aural, which has some very good advice for people at all levels who find it difficult - have a look at it if you haven't already done so.