My clutch slave cylinder was replaced today but my brake fluid warning light came on for a second on two bends. Is this more likely an electrical fault? I will take it back to the garage nect week.
Along the lines of what Josh is saying, a lot of cars these days have the clutch and brake master cylinders combined with a tube running from the brake to the clutch to supply it with fluid. If they didn't refill the brake fluid when they did your clutch slave, it could be causing the light to come on.