The UK has delivered more than 85,000 military drones to Ukraine over the last six months, the Defence Secretary is to say, amid a surge in Russian one-way attack drone strikes.
John Healey will say that ÂŁ600 million has been invested this year to accelerate drone delivery for Kyivâs armed forces.
The drones â including tens of thousands of short-range first-person view models â are being used for reconnaissance, precision strikes, and to disrupt Russian operations behind the front lines.
The Defence Secretary will tell the latest meeting of the Ukraine Defence Contact Group in Brussels on Wednesday that Western countries need to âramp up drone production to outmatch (Vladimir) Putinâs escalationâ following increased drone strikes in Ukraine and incursions into European airspace.
Western officials said that in September, Russia launched around 5,500 one-way attack drones into Ukraine â a significant increase from 4,100 in August.
In October so far, more than 2,400 have already been launched, with attacks focused on Ukrainian critical national infrastructure, notably gas storage and production facilities.
As Ukraine moves to safeguard its energy resources ahead of winter, Russia is âseeking to target those, unfortunately quite effectively,â officials said.
Mr Healey and his Ukrainian counterpart Denys Shmyhal last month signed a technology-sharing deal through which the UK is jointly developing an interceptor drone to help Ukraine fight off Russian aerial attacks.
Battlefield data is now being used to scale up production, with the aim of sending thousands of new models to Ukraine each month.

Mr Healey, who is co-hosting the Ukraine Defence Contact Group gathering with Germany, said: âPutinâs dangerous escalation in Ukraine and across Europe must be matched by ramping up our drone production and strengthening Natoâs air defences.
âThe UK is stepping up our support to Ukraine by delivering over 85,000 drones in the last six months and signing new industrial partnerships to rapidly develop thousands of new interceptor drones to shoot down Putinâs attacks. This is growing jobs in both the UK and Ukraine.
âI am also extending the UKâs commitment to Natoâs Eastern Sentry air policing mission to the end of the year to continue to deter Putin from further testing the Alliance.â
The Defence Secretary will also attend a meeting of Nato defence ministers, where he will confirm the extension of the Royal Air Forceâs contribution to the defence allianceâs Eastern Sentry mission to the end of the year.
British Typhoon fighter jets have been taking part in defensive flights over Polish airspace after Russian drone incursions last month.
Counter-drone experts from the British military will also help train Moldovaâs armed forces in counter-drone tactics, according to the Ministry of Defence.
The ÂŁ600 million spent on drones for Ukraine has been drawn from the record ÂŁ4.5 billion committed by the Government this year for its defence.
British companies including Tekever, Windracer and Malloy are among the suppliers.
Sir Keir Starmer last week said the UK was ready to progress plans to use frozen Russian assets to support Ukraineâs war effort and to try to bring Moscow to the negotiating table.
Western officials said there was âreal momentum for the first time in a long timeâ, with expectations that plans will be âvery live over the next few weeksâ.
âAlthough thatâs not quite at the decision point, it is potentially a very major turning point that will really help Ukraine ensure fiscal sustainability for the next few years,â they said.
They told reporters that a âlarge UK sanctions packageâ would be announced in due course, which alongside a EU one âwill see quite large muscle moves against the Russian energy sector, against the shadow fleet, and against certain countries who are importing and profiting from Russian hydrocarbonsâ.
Officials said: âOne of the things that we are very much trying to do through the work on assets and the work on sanctions is trying to show Putin that this is not only enormously costly â whatever it is, 450,000 casualties a year for under 1% of Ukraineâs territory â but also that Ukraine is making serious plans to sustain this and that the pressures on the economy are only likely to grow.â