I once filled my petrol espace with diesel (we had a diesel Diahatsu as well at the time), fortunately I realised. I didn't start the engine.But I had a tank 95% full of diesel.
Had to get the wife out in the Diahatsu to tow me home. Took the fuel pipe off and had to spend the next 3 hour draining the anti syphon protected fuel tank by turning on the ignition until the fuel pump stopped turn off the ignition, turn on the ignition etc etc etc etc.
Valuable lesson learned. If you don't want RSI in your wrist DO NOT PUT DIESEL IN!
Fortunately as I hadn't started the car, I got away scott free if not rather annoyed with myself.
On the up side, the diesel was used in the Diahatsu the next day.
Steve L.