Power steering unit on my C3?

On Monday I was driving back to Luton from Southend when a sign on the dash saying Power Steering Fault and a red light was permanently on. Turned off and on several times, but no joy. Car got me home ok but very hard on the corners. Tuesday morning I took car back to Citroen and told them the story with a few add ons to beef the story up. I left car to be looked at, 2 hours later I get a call from the repairers stating Citroen are footing the £433 bill. Delighted I was, even more so that the car was ready 11am the next day.