Insurers will go bust if they are forced to cover the cost of Vladimir Putin’s war in Ukraine, the founder of one of the world’s biggest brokers has warned. David Howden, who has built an £11bn eponymous insurance empire, said his industry cannot be expected to cover the cost of war, amid a row over Mr Putin’s seizure of hundreds of commercial aircraft. Mr Howden said: “The insurance market cannot be a systemic backstop for a war between the UK and Russia. And it's not designed to be. No policie