Brake Accumulator Sphere & Seal. If your brake warning lights are coming on, especially after you have used the brakes then low pressure in your accumulator spheres is the most likely cause...

This is the large Olive Accumulator Valve Body to the pipe. 1980-1998  Silver Spirit, Silver Spur, Mulsanne, Turbo R Pre Arnage 

This is the Olive Accumulator Valve body to the pipe. 1980-1998  Silver Spirit, Silver Spur, Mulsanne, Turbo R Pre Arnage 

This is the Rear Brake Hose Pump Feed Hose. 1987-1998  Silver Spirit, Silver Spur, Mulsanne, Turbo R Pre Arnage (From VIN 20000 onward)

The fluid return system from the brake accumulator spheres to the reservoir consists of a low pressure return hose from the front and rear accumulator. These hoses join onto two unions (UR70275) and...