Indian authorities have started handing over remains of the victims of one of India's worst aviation disasters after identifying some through DNA tests.

Doctors in India say 270 bodies have been recovered from the site of Thursday's plane crash in Ahmedabad. The London-bound aircraft crashed into a residential area shortly after take-off killing all but one of the 242 passengers, a 40-year-old British man.

While the official investigation is ongoing, preliminary video footage and expert reviews have highlighted several main theories.