Getty ImagesUK military personnel and equipment are being sent to Belgium to help it bolster its defences after drone incursions on its airspace, suspected of being carried out by Russia.The new head of the UK military, Sir Richard Knighton, told the BBC's Sunday with Laura Kuenssberg that his Belgian counterpart asked for assistance earlier this week and that kit and personnel were on the way.Belgium's main airport Zavantem was forced to close temporarily on Thursday night after drones were spotted nearby. They were also spotted in other locations, including a military base."The defence secretary and I agreed that we would deploy our people and our equipment to Belgium to help them," he told the BBC.Sir Richard did not confirm if the drones were from Russia, but added it was "plausible" they had been ordered by Moscow.Alongside Nato allies, he added that the UK would help Belgium "by providing our kit and capability" which he said was already being deployed.It comes after Sir Richard warned in of an "increasingly certain world" in a Sunday Telegraph opinion column to mark Remembrance Sunday.Citing Russia's invasion of Ukraine, he said: "This conflict reminds us that peace is never guaranteed. It [the UK] must be defended, and sometimes at great cost". Drone incursions over Western Europe could "feasibly" have been sent by the Kremlin, Sir Richard said.About 3,000 Brussels Airlines passengers were affected by the disruption, and the carrier said it faced "considerable costs" from cancelling or diverting dozens of flights.German Defence Minister Boris Pistorius and the Belgian security services have said they suspect Russia, but Belgian Defence Minister Theo Francken has previously admitted there is no accompanying evidence."At first, drones flying over our military bases were seen as our problem," Francken said earlier this week."Now it has become a serious threat affecting civilian infrastructure across multiple European countries."A number of drone sightings have caused major flight disruptions across Europe in recent months, including in Sweden, Norway and Denmark.Despite some officials blaming "hybrid warfare" by Russia, the Kremlin has denied any involvement.Pistorious has suggested the latest sightings could be linked to European Union discussions to use frozen Russian assets to support Ukraine in the form of a €140bn loan.While there is no public proof of Russia's involvement, suspicions have been fuelled by more serious airspace incursions by Russia in Eastern Europe over recent months, involving fighter jets and larger attack drones.The UK has recently sent RAF Typhoon jets to take part in defence missions over Poland as part of Nato's mission to bolster the eastern flank in response to incursions.How much do Nato members spend on defence?EU sets 2027 target for anti-drone system to defend against Russia