Guys -
I can now confirm that the Corner Braking Control (CBC) is disabled on my 1M when I turn off fully the traction control.
Mike Benvo (bpmsport.com) coded the DSC ecm on my car so it operates like the E9x M3 so all traction control except the ABS is turned off when you hold the button down. In other words, the CBC is switchable.
Makes an enormous difference as I can now rotate the car using the brakes.
I'm extremely pleased
Neil