David Cameron is to chair a meeting of the Government's Cobra contingencies committee on Wednesday to discuss the ongoing epidemic of Ebola in Western Africa.
Ahead of the meeting, the PM spoke to the president of Sierra Leone Ernest Bai Koroma, who said the situation in his country continues to be "very serious".
Mr Cameron assured him the UK will continue to do everything it can to support his administration's efforts to battle the disease. Britain has already provided aid totalling £125 million.
Downing Street stressed that the meeting in Whitehall was one of a regular series of meetings and had been in the PM's diary for some time.
A Number 10 spokesman said: "As part of the Government's ongoing efforts to combat the outbreak of Ebola in West Africa, the Prime Minister will chair this week's Cobra meeting on Wednesday.
"This is part of an ongoing series of Cobra meetings to co-ordinate the UK response that started in late July and has been in the diary for some time.
"Ahead of the meeting, the Prime Minister called President Koroma of Sierra Leone on Tuesday evening to get the latest on the situation there and the help they need.
"The Prime Minister and President Koroma discussed how the £125 million in UK aid was helping efforts, including support for 700 extra beds in key treatment centres and training for medical staff.
"The President said the situation continued to be very serious and they were increasing their response, with a need to train more medical staff, have a better system for servicing treatment centres and improve the burial process.
"The Prime Minister said the UK would continue to do all it could to support their efforts."