British Prime Minister Rishi Sunak and UN Secretary-General Antonio Guterres agreed on the need to scale up delivery of humanitarian aid to Gaza, the prime minister's office said on Thursday.

"The leaders ... discussed the worsening humanitarian situation in Gaza and agreed on the importance of urgently scaling up the delivery of life-saving humanitarian aid," a Downing Street spokesperson said.

The two leaders met as they attended talks on the final day of the inaugural AI Safety Summit at Bletchley Park in England.