While driving I could feel the foot pedal had dropped slightly. The travel was more.
When I parked up and then started the car again and drove off. When I pressed the brake pedal it was on the floor.
Pumped it and it came back up.
Got home and parked the car.
Went back out to it 30 minutes later and the pedal is at the top again and seams to be working as normal.
Would this be the master cylinder or brake servo?