One of my work colleagues at RR claimed to have witnessed this event.
if I remember his version correctly: he was on the flightline at the time and claimed the pilot had a heated discussion with someone just prior to strapping in. The aircraft taxied and took off, but the tanks departed the aircraft on initial climb out and 'napalmed' (his phrase) a cabbage field at the end of the runway.
The above may be second hand codswallop.