Grinding Noise in Reverse - Citroen C4

[TehRin]

Evening all, after recently purchasing a Citroen C4, during my daily rounds I've noticed a slight grinding noise when pulling off in reverse - it doesn't occur every time I reverse, probably around a third of the time or when driving for a prolonged time. After pulling off in reverse the noise stops. Could it be down to the brakes as the discs and the pads require changing?

I'd like to know if this is possible as I could probably get my money back as the car was bought off a family friend (a car dealer.. ) and was convinced it was a well looked after car which would want for nothing so I bought it with my eyes pretty much closed as it was also up for a good price - I'm a fool I know and I should have took it for a more in depth test drive.

[E-bmw]

Sounds likely to be the brakes un-binding after a transition front forward to reverse, a good look round/clean/etc on the calipers (which is a normal service task that everyone forgets) will probably sort it.