Need some help with identifying a squeak that has started on my R53 and seems to have got worse as the weather has warmed up.

Only happens when reversing and starts just as the clutch bites and the car starts moving and stops when you pick up a bit of speed. It's a squeak/chirp sound and sounds like it is coming from the front passenger area.

Have ruled out the JCW Brembo's. Clutch was changed last year. Surely if it was drive shaft related it would happen going forwards as well?

Don't think it is suspension related as there are no other noises when going over speed bumps etc.

Help!

i had a squeak sound in my car , fixed it very easily :
it was an electric cable coming from the door area right underneath the glovebox area into the main console , it was touching the plastic and making this sound..