Little problem with my Saxo that I'm after some help with. It's 1.1 Desire, coming up to three years old with 51K on the clock. When I'm driving a long I keep intermittently hearing a constant squeaking noise coming from the front passenger side wheel, which stops when I apply the brake and then starts again when I take the brake off. I had the car serviced last week (not at a Citroen dealer - too expensive) but it was a major service including brake fluid change and brakes cleaned, they weren't able to find the cause of the noise and they didn't hear it themselves. The brakes are fine as they were checked on the service and cleaned. The wheel has been changed due to a flat and it still does it. I've noticed that it doesn't do it until I've driven about 10 miles then it starts.
Anyone any ideas what could be causing it?