I would have got it pumped and flushed, I was told diesel works as a lubricant for the injector pump, due to the small parts and high pressure of modern injector pump common rail diesel engines it only takes a few seconds with no lube to send the fuel pump into oblivion.
a comparison with an old land rover isn't really fair as they're designed to run on parrafin in 3rd world countries.
http://motortorque.askaprice.com/ar...-diesel-engine-frequently-asked-questions.asp
How does the wrong fuel type affect engines?
Petrol in a diesel engine
Breakdown organisations put the figure of petrol misfuelling at around 150,000 cars a year, with repair bills totalling hundreds of millions of pounds.
Petrol will strip your diesel engine of the lubricant used to keep it ticking over and cause metal components to grate against each other and disintegrate.
This runs the risk of damaging the fuel pump and fuel-injection systems, or wrecking an engine completely if used for a significant amount of time.
To make matters worse pre-ignition systems start fuel pumps in new diesel models when car doors are unlocked. This cuts out the time it takes for new diesel engines to warm up, but means that diesel engines can be ruined by petrol by simply unlocking doors.
The fuel pump and injection systems and filters will likely need to be replaced on new models, while an entire engine could be wrecked beyond repair if it has been run for long enough. Regardless of the extent of the damage, the repair bill could potentially run into thousands of pounds.
Avoiding turning the engine over or stopping as soon as possible is vital to prevent more damage to the engine in these circumstances. A fuel-tank drain could be sufficient in such cases to prevent damage.