And his friend Stewart has a special reason to remember him.

Russia has continued to make billions from fossil fuel exports to the West, data shows, helping to finance its full-scale invasion of Ukraine – now in its fourth year.Since the start of that invasion in February 2022, Russia has made more than three times as much money by exporting hydrocarbons than Ukraine has received in aid allocated by its allies.

Data analysed by the BBC show that Ukraine's Western allies have paid Russia more for its hydrocarbons than they have given Ukraine in aid.Campaigners say governments in Europe and North America need to do more to stop Russian oil and gas from fuelling the war with Ukraine.Proceeds made from selling oil and gas are key to keeping Russia's war machine going.

Oil and gas account for almost a third of Russia's state revenue and more than 60% of its exports.In the wake of the February 2022 invasion, Ukraine's allies imposed sanctions on Russian hydrocarbons. The US and UK banned Russian oil and gas, while the EU banned Russian seaborne crude imports, but not gas.

Despite this, by 29 May, Russia had made more than €883bn ($973bn; £740bn) in revenue from fossil fuel exports since the start of the full-scale invasion, including €228bn from the sanctioning countries,

The lion's share of that amount, €209bn, came from EU member states.Officers who responded found multiple people injured, including those with burns.

Footage that appeared to be from the attack showed a chaotic scene: smoke filling the air, people running in multiple directions, spots of grass on fire and people injured on the ground.In images and videos posted online, but not yet verified by the BBC, a man appearing to be the suspect is seen without a shirt and holding bottles with liquid with a piece of red cloth inside. He can be heard yelling at the crowd and appears to be advancing on them as some rush to flee.

As he screams, one woman is on the ground and appears injured. People surround her and one man pours water on her body.Footage shows police rushing to the scene and arresting the suspect. Police say he was taken to the hospital with injuries.