The pilot of MH17 radioed that he 'felt uncomfortable' about the route he was flying while over Ukraine and fatally altered his course to hostile territory, according to an expert.
Dr Igor Sutyagin, Research Fellow in Russian Studies from the Royal United Services Institute, believes that MH17 was shot down by rebels based in the 3rd District of Torez, in eastern Ukraine, after mistaking his plane for a government military transport aircraft.
He told MailOnline that information had been leaked from a source he was unwilling to name that the pilot of MH17 'felt bad' about his course over Ukrainian airspace, so changed direction.
Dr Sutyagin's theory appears to be supported by a route map which shows the passenger plane travelling on a different course to the ones taken by the previous ten MH17 flights.
Twitter user Vagelis Karmiros collated the information from Flightaware, the largest flight tracking website in the world.
Dr Sutyagin said: 'There is a Ukrainian mechanised brigade blocked by separatists near the Russian border.
'It's blocked on three sides by separatists and behind the brigade is the Russian border, so they can't get out. The Ukrainians try to resupply them from the air by transport aircraft.
'Now, the pilot of MH17 said that he "felt bad" and wanted to change course south to get out of the danger zone. But several kilometers to the south is a Ukrainian Army heavy transport plane, an IL76, or Candid, which has the same echo as a 777 on a radar screen.
'The two planes came close. They tried to shoot down the transport delivering supplies to the brigade. They believed that they had been firing at a military plane, but they mistakenly shoot down a civilian airliner.'
