Britain's foreign secretary announced plans Wednesday for hundreds of Ebola treatment beds in Sierra Leone within weeks, admitting the global response had been too slow as he visited the former colony.

Philip Hammond said 700 beds were planned across the ravaged west African nation as he toured a treatment center under construction in the quarantined northwestern district of Port Loko.

"We've come in here from a standing start. We've got a couple hundred beds up and running already," said the minister, wrapping up a one-day trip for talks with President Ernest Bai Koroma.

"We are going to have the committed number of beds delivered by the middle or end of January. That's a pretty impressive performance . . . This was jungle just a few weeks ago."

Hammond conceded that it had taken western governments "longer than we would have liked to mobilize" in west Africa, which has seen more than 5,000 deaths from Ebola since December in the worst outbreak on record.

But he added that Britain had "gripped the situation here in Sierra Leone — we've brought resources in."

Some beds had already been announced but it was the first time Britain had committed itself publicly to the tight deadline.

"We are using the military who are used to doing things at scale against a timetable. We have been able to accelerate the speed with which things are being done," he said.

"You are looking at a building project here, including a lot of work on the ground, that probably would have taken nine months to do in normal conditions, being done in four five six weeks."

Army spokesman Simon Reeves said 100-bed treatment centers in five towns across the country — including two in the hardest hit western region which includes the capital Freetown, would be completed by the end of November.

Britain is taking the international lead role in tackling Ebola in Sierra Leone due to its historic links with its former colony, which gained independence in 1961.

A civilian-staffed military medical support ship arrived in Freetown last month with materials to build medical units and help keep them supplied.

Some 80 medics and 80 marines were among the 350 people on board, bringing the total British deployment to fight Ebola in Sierra Leone to about 800 people.