From the owners manual...
"Park Brake & Brake Fail" warning lite, If the symbol illuminates while driving 'and' the park brake is released, a fault with the brakes is indicated.....
A warning will chime if you attempt to drive off without releasing the park brake.
From the service manual...
MASTER CYLINDER CONSTRUCTION
The internal parts of the master cylinder comprise a primary piston with an L type seal and an O-ring seal, a secondary valve which incorporates a centre valve, a caged spring and two L type seals, a return spring, a secondary piston stop pin, and a fast fill valve. In all vehicles, a proportioning valve is located in a parallel bore in the same casting. This valve is used to maintain the front to rear hydraulic pressure balance and, should one of the two separate systems fail, a separate piston and differential switch (brake warning lamp switch) are incorporated into the design, so that the vehicle operator can be warned of a system malfunction.
Might need to bleed the system again.