"We recognize Turkey has a legitimate interest in the security of its borders," the spokesman of UK Prime Minister Theresa May told reporters on Monday.
The spokesperson also added that Britain seeks to find ways of ceasing violence in Syria in the wake of Turkey's operation.
"The UK is committed to working closely with Turkey and other allies to find solutions that provide stability, refrain from escalating the situation and protect Turkey's security interests."
Turkey has been fighting Kurdish groups affiliated with the Kurdistan Workers' Party, banned by Ankara as a terrorist organization, for decades. Turkish Defense Minister Nurettin Canikli explained that operation in Afrin is aimed at destroying all "terrorist corridors," adding that Ankara is exercising its "right to self-defense in line with international law."