Sounds like a Servo issue. It's possibly a crimped/leaking seam or pipe or vacuum hose leading to/from the brake servo, they need to check all the pipework throughout the braking system.
Also have them check the brake calipers for wear.
DO NOT DRIVE THE CAR WITH THIS TYPE OF ISSUE - the same issue may occur when the car is moving forwards and you would have little or no braking.
Edited by MikeTorque on 31/01/2013 at 21:53
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