Number 10 said David Cameron spoke to French President Francois Hollande on Sunday evening about further possible British help for French forces in Mali.
The UK said it was “ready to provide further assistance where we can and depending what French requests may be”.
French-led troops have taken Timbuktu in their operation against Islamists.
BBC defence correspondent Caroline Wyatt said there was still no question of British forces taking on a combat role in Mali.
But the UK has made clear to France that it is ready to offer more help towards its operations there.