Hello fellow Galaxy owners. (new road tax amounts sucks)

I have a 2.3 Petrol Galaxy on a 53 plate, it's only done 23 thousand miles and I have noticed a high pitched squeak / squeal coming from the back end. It does happen sometimes at lower speeds but it kicks in at 60 MPH plus. It happens intermittently, mayby every few minutes for 5 to 10 seconds.

Any ideas ?

Additional Info'

Took car to dealers, a rusted slider stuck inside the carrier prevented the inner brake pad from releasing from the disk on left rear. The pad worn down to nearly nothing.

New set of pads being fitted and Ford paying for the replacement carrier (I think) :-)