Instead, he’s contented himself with small, easy announcements, like knocking VAT off electricity bills, cutting the bus fare cap to ยฃ2 or reducing business rates for pubs. The difficult bit is working out how to pay for them. So far, he’s avoided that. Bigger decisions lie ahead, on social care, council house building, welfare reform, immigration and stopping the boats. When he finally tackles those, we’ll get the measure of the man.

However, Burnham has to understand what we’re getting into here. Ukraine has been using drones made by two British companies in deep strikes against Russian territory. Britain is also providing increasingly advanced weaponry, including Storm Shadow missiles. Now we’ve just handed Ukraine blueprints to manufacture Storm Shadow missiles themselves. Russia warned that will โ€œadd fuel to the fireโ€ of the conflictโ€.

Burnham shot back: โ€œWho started the fire? Thatโ€™s fighting talk, but the PM has to understand that words are nowhere near enough. This is a hot war, not a cold one. If we’re backing Ukrainian strikes deep inside Russia, we have to accept that Russia might strike us in some way.

Russia might also launch covert cyber-attacks against civilian targets in Britain, such as the NHS or our transport system. Or menace passenger airports with drones, as he’s done in Germany. Attacks against our undersea infrastructure are possible. As are targeted assassinations of Ukrainian sympathisers in Britain. Remember the Salisbury poisonings?

Russia is mostly mouth. Putin supporters have repeatedly threatened World War III without starting it. But Britain isn’t mentally prepared for war. We’ve faced terror bombings since the Second World War, but this could be on a different scale. We are not psychologically prepared for what Ukraine has undergone.

Burnham is talking the talk. At some point soon, he might have to walk the walk. He needs to start making those difficult decisions. Now.