The aftershock, felt as far away as New Delhi, sent people in Nepal’s devastated capital running on to the street once again, witnesses reported.

“Massive aftershock. A wall of a old house next to mine has collapsed now. Kathmandu is in shock again. People on streets,” one Kathmandu resident tweeted.

It hit as teams from all over the world headed to Nepal to search for survivors and provide food and shelter to people left homeless by Saturday’s 7.9 magnitude quake.

Indian air force planes were among the first to arrive, landing on Sunday with 43 tons of aid, including tents and food, and nearly 200 rescuers.

UK teams set to join the relief effort include 14 volunteers from from UK charity Search and Rescue Assistance in Disasters.

They are heading to Kathmandu with 1.5 tons of specialist equipment to rescue people from collapsed buildings.

The quake, which hit on Saturday, flattened houses and temples and triggered an avalanche on Everest which killed 17 – the worst ever loss of life on the mountain.

Police in the capital Kathmandu say bodies are still arriving at one hospital in the city.

Officer Sudan Shreshtha told reporters his team had brought in 166 corpses overnight.

Tens of thousands of terrified Kathmandu residents also spent the night outside in freezing temperatures fearing another major tremor.

Most areas in the city of one million also remain without power and water.

“We hardly slept through the night…I don’t think I am going to be sleeping inside the house anytime soon. We are all petrified,” said Ratna Singh, a local vegetable seller.

Kathmandu’s iconic Dharahara tower was the most high-profile building to be destroyed, with rescuers scrambling to reach up to 200 people reportedly stuck inside.

The quake was the worst in Nepal for 81 years and was particularly devastating as it occurred at a shallow depth of just 7 miles.

There were also reported deaths in India, where the death toll stood at 53 and in Tibet where at least 17 people were killed, according to Chinese state media.

Tremors were felt as far away as Pakistan and Bangladesh.

Friends and families of the missing have been using Facebook and Google’s post-disaster search tool, Person Finder, to appeal for information.

Sebastian Lovera, from Tonbridge, is one of those still to get in touch with his family.

The 22-year-old’s stepfather, Greg Smye-Rumsby, said: “We haven’t heard from him. He would not have switched his phone off.

“We have tried ringing it. Sometimes it rings and sometimes we get an answer but it’s an automated answer. It says the phone is switched off.”

Charities are also reacting quickly to the disaster.

Christian Aid has made available an initial £50,000 available for relief efforts and the British Red Cross has launched an appeal for funds.

Prime Minister David Cameron has also pledged his support, tweeting: “Shocking news about the earthquake in Nepal – the UK will do all we can to help those caught up in it.”

:: The Foreign Office has advised that any British Nationals in need of consular assistance call +44 (0) 207 008 0000.