Peugeot 206 Brake Noise

[scrubbie]

When driving I brake and, on releasing the brake pedal, there is a highish pitched noise/squeak. It doesn't last very long.....one or two seconds. I'm thinking maybe a servo or servo pipe leak? Is there any way of checking this or is a visit to a Peugeot main dealer required.

Any advice and/or pointers in the right direction would be much appreciated.

Cheers.