Citroen C1 engine cut out

This is my grand daughters car. Whilst travelling down the motorway to work this morning, the engine cut out. She was travelling between 60-70 mph. She says all the electrics went off apart from the Hazard lights. When she tried to start it again everything was okay and she has not had a problem coming home. I know my Peugeot camper has just had a recall for faulty ignition switch. Does anybody know whether the C1 has had a similar problem.