Chatham

The vehicle struck multiple people outside a building in Chatham on Monday afternoon, then continued through the building, hitting several people inside before exiting out the opposite side.

Orysia Lutsevych, head of the Ukraine Forum at Chatham House says it's interesting how Ukrainians rallied around Zelensky after the Oval Office, almost like they took it as a personal insult of Ukrainian statehood.

"Look at Russia's objectives in Europe," says Armida van Rij, head of the Europe programme at Chatham House.

Robin Potter, a research fellow at Chatham House, said Heathrow was one of only two UK airports – Gatwick is the other – that has any level of regulation around its resilience standards.

Dr Marion Messmer, a senior research fellow on the International Security Programme at Chatham House, thinks the most likely trigger for a war with Russia would be miscalculation, rather than design.