2003 Rover 25 squeaking suspension

There are a number of possible solutions depending on if the noise is coming from but most likely is the brake pads binding on the discs. Best way to see is to jack up the offending corner and try to spin the wheel. If it spins freely then would imagine the problem to be more severe. Ensure all your wheel nuts have been tightened correctly. The problem could be the wheel bearing which would be rough when trying to spin the wheel but best to ensure your wheel nuts are all tight then take it back to the garage.