The National Security Council is to meet to discuss the situation in Mali amid assurances from ministers that British ground troops will not be drawn into combat operations against al Qaida-backed rebels.
Ministers insist the UK is providing only "limited logistical support" in support of the French military mission in the west African state, with no plans to deploy ground forces.
The first of two giant RAF C-17 transport aircraft left Paris on Monday night with supplies for the French force sent in by President Francois Hollande following an appeal for help by the Mali government. A second C-17 is expected to leave after encountering what was described as a "minor technical fault" in the French capital.
Foreign Office minister Mark Simmonds said a "small detachment of technical personnel" was already at the airport in the capital Bamako to "operate and if necessary defend" the aircraft.
In a Commons statement on Monday he said David Cameron had made clear Britain was offering only limited back-up support when he spoke to Mr Hollande at the weekend.
"The Prime Minister has made categorically clear that the initial supporting deployment will be for a period of one week," he said. "He has also made clear that there will be no combat troops from the UK involved and we have no plans to provide more military assistance."
He said the situation in Mali was of "grave concern" to the UK and that it was essential to prevent the rebel-held north becoming a "springboard for extremism" in the region.
Meanwhile, the European Union said it is bringing forward a planned military training mission to Mali, which will now be launched "in the second half of February or early March".
Hundreds of French troops were deployed to the country on Saturday after the rebels overran the strategically important town of Konna last week. Despite the presence of the French, the government forces suffered a further setback with the loss of the garrison village of Diabaly in central Mali, taking the rebels within 250 miles of Bamako.
Former foreign office minister Peter Hain expressed scepticism at predictions by the French that their troops would be out of the country "in a matter of weeks". "That seems to me pretty unlikely," he said. "This could become an incredibly long, drawn-out and difficult morass."