I accidentally put petrol in my diesel tank

We are OAPs (that places us in the almost idiot class to some!) On Saturday my wife put £5.00s worth of Sainsbury's City Diesel in the petrol tank of her 2004 Daihatsu Charade - because the fuel warning...

Small drive, small car

I am limited for parking space on the drive. What is the smallest car available? Can you still buy used 'Bubble' cars?