Nepal earthquake and Everest avalanche kill more than 3,300 people with 'violent' aftershock causing more chaos

By David Millward, Barney Henderson and Josie Ensor:

_{Members of the Chinese International Search and Rescue Team arrive at Tribhuwan International Airport in Kathmandu (Rex)}

Foreign Secretary says some British nationals "almost certainly" caught up in Nepal's earthquake, but no reports yet of any Britons killed or injured - follow latest updates...updates here...