A British couple on their honeymoon
are among a number of Britons caught up in the Nepal earthquake and
subsequent avalanches which hit the Everest area.
On their blog,
Alex Schneider and Sam Chappatte, who are safe but cut off at a Mount
Everest camp, described seeing an "avalanche coming straight at us".Other UK climbers have posted on social media about being stranded on Everest.
Nearly 2,000 people died in Saturday's earthquake, and a powerful aftershock was felt on Sunday.
The UK Foreign Office (FCO) has released an emergency number +44 (0) 207 008 0000 for British nationals needing assistance and advised Britons in the area to stay "in a place of safety".
Foreign Secretary Philip Hammond said the British Embassy in Nepal was offering assistance to the authorities.
Prime Minister David Cameron said the UK would do all it could to help in the aftermath of the earthquake.
The search engine Google has launched a website to help locate those caught up in the disaster.
Foreign climbers and their Nepalese guides around Mount Everest were affected by the tremors and a huge avalanche that followed Saturday's quake.
A powerful aftershock was felt on Sunday and more avalanches were reported near Everest.
'Tiny island'
The British newly-weds explained how they had been cut off from base camp: "We staggered out to see an avalanche coming straight at us."A blast of wind knocked us down but we were able to get up and run to shelter behind some tents and anchor ourselves with our axes.
"We have heard that our part of Base Camp has been flattened. There is talk of possibly hiking up to Camp 2 but for the moment we are acclimatising and waiting."
Daniel Mazur, an expedition leader from Bristol, tweeted on Sunday morning: "Aftershock @ 1pm! Horrible here in camp 1. Avalanches on 3 sides. C1 a tiny island. We worry about icefall team below.. Alive?"
"We had a visit from British Army Everest team at breakfast who are wanting to pull back to Kathmandu and help the relief effort.
"South side Everest is truly dire so we are lucky on north side."
Helicopters have rescued seriously-injured climbers from base camp and later rescued a few climbers from camp one, further up the mountain.
One of those stranded at camp one is 19-year-old Alex Staniforth from Chester.
According to his twitter account, currently being administered from the UK, he "is very worried for those at EBC [Everest Base Camp], is in shock and has described being scared for his life as the avalanche went through them."
Seventeen people are confirmed to have been killed on Mount Everest - the mountain's worst-ever disaster.
British charities are assembling disaster teams to join the Nepalese rescue effort. Experts from the UK travelled to the country overnight and will begin to assess the damage.
Oxfam, Christian Aid, Save the Children, the British Red Cross and Plan International UK have all confirmed they are providing humanitarian assistance.
Source - BBC UK