Britain will send an additional £37million foreign aid package to war-torn Yemen, International Development Secretary Priti Patel has announced.
The extra money, which comes out of the UK Government's foreign aid budget, will bring the total spent in Yemen this year to £100million.
But the UK Government has been accused of hypocrisy for its arms sales to Saudi Arabia, which has played a key role in Yemen's brutal civil war by bombing the rebels.
Britain has backed Saudi Arabia in its efforts to reinstate the Yemen government, which was ousted in 2014.
More than 10,000 people have been killed in the brutal civil war in the country since the civil war broke out 18 months ago, including 3,800 civilians.
Eight in ten people in Yemen are in need of help, the Government says.
Ms Patel announced the extra humanitarian aid at the UN summit in New York, where she held meetings with leaders from the region to address what the Government describes as 'one of the worst and most forgotten humanitarian crises of our time'.
Ministers and charities agreed to a 'step change in the humanitarian effort on the ground' with a fresh focus on providing critical supplies such as water, food, shelter and nutrition.
Ms Patel said: 'The humanitarian situation in Yemen is the forgotten crisis that demands action. 7 million people are in desperate need of food and the threat of famine remains.
'The international community must step up its response to match the seriousness of the challenges faced by people in Yemen.
'The UK has provided food, water, shelter and medical supplies for more than a million desperate people in Yemen and our new support will help even more. But the international response remains critically underfunded. I urge other countries to follow Britain’s lead and make good on their commitments – only by working together we can help stem this disaster.
'We cannot and will not stand back in silence whilst innocent people are suffering from such a lack of basic provisions such as food and clean water.'
But there are increasing calls on the UK Government to halt sales of arms to Saudi Arabia amid allegations it has breached international humanitarian law.
The UN has raised concerns with more than 100 missions launched by Saudi Arabia over Yemen.
Ms Patel insisted the Government had a 'robust policy and position on arms controls' but Labour said the continued arms sales 'negate' its humanitarian work in the region.
Shadow International Development Secretary Kate Osamor told the House magazine: 'You can't be bedfellows with these people who are actually dictators and are taking people's lives and using our friendship in such a flamboyant way.'
The UK's extra aid money will aim to provide more than 400,000 people with access to safe water, help more than 11,000 with food, provide livestock to families, give emergency cash transfers to 105,000 vulnerable people and help 300,000 get access to healthcare.
The latest foreign aid announcement came 24 hours after Theresa May unveiled a £750million package to aid immigration hotspots.
She said Britain will also send hundreds of troops to Somalia to help fight people smugglers.
The Prime Minister said the aim was to keep Britain safe from Islamist terrorists while reducing ‘unprecedented’ levels of migration to Europe and the UK.
The hundreds of millions of pounds of aid will be targeted on helping refugees in Syria, Jordan, Lebanon, Ethiopia and Somalia – rather than risk them making the journey to Europe instead.
At the same time, she committed the UK to send hundreds of troops to Somalia to help in the fight against the resurgent Al-Shabaab terror group.
Up to 30 military units, made up of between five and 15 soldiers each, will be deployed to what is one of the world’s most dangerous countries to train its security forces.
No.10 said that, at any one time, there would be no more than 70 troops in a country notorious for the deaths of 18 US servicemen in the Black Hawk Down incident in 1993.
A senior No.10 source said the aim of the announcements, and Mrs May’s foreign policy in general, was guided by ‘how best to serve Britain’s interests’. She is determined to use the £12billion annual aid budget to protect the country from terrorism and regain control of our borders.
She also favours early intervention to deal with problems before they reach Britain’s shores, sources said.
Mrs May told the UN General Assembly in New York: ‘We must never forget that we stand here, at this United Nations, as servants of the men and women that we represent back at home.’
She added that it was ‘vital’ that Britain helps to build the capacity of the Somalian security services against Al-Shabaab.
The fanatical Islamist group has plotted a string of atrocities against UK targets, both at home and abroad, and was responsible for the attack on the Westgate shopping centre in Kenya which killed 67 people in 2013.
The so-called British white widow, Samantha Lewthwaite, is a key member of the group.
Mrs May restated her commitment to Britain spending 2 per cent of its GDP on defence and, controversially, 0.7 per cent of GDP in overseas aid.