Brigadier Bob Bruce, commander of Task Force Helmand, said the capabilities of Afghan forces have "risen markedly" over the last eight to 12 months.
He told reporters: "The Afghans working with us now really are in control. The insurgency is still there. It's not gone but it doesn't dictate things."
More top news
Donald Trump has accused Barack Obama of failing to take action over Russia's alleged interference in the US election.
Ministers are reportedly 'dropping' plans to ease fire safety standards in new schools in the wake of the Grenfell Tower fire.
A 24-year-old mum has been arrested on suspicion of two counts of injury to a child after her young children were found dead in a hot car.