Hello Guys,
Will check for the valve, though you are confusing me now. I'll check the Haynes manual tonight. Is it at the back of the front left caliper? I s that what you mean? The fluid is coming from behind the front left caliper, not the rear brakes at all. As enri says the handbrake operates on the front disk calipers on a sud.
PS I'm sure my car was sabotaged at the concourse by the despicable opposition (BMW, Mercedes etc...no offence).
Paolo