Ukraine - what should the west do next?

It's 125 days since Russia's tanks rolled into Ukraine in a full scale invasion of the country. Since then the world has watched, appalled by the bloodshed, the destruction of towns and cities, the 12 million refugees. At first there was relief that the Ukrainians had beaten back the attack on the capital Kyiv. Now there is less optimism as Russia takes more territory in the east.

From the start Britain and its allies have been clear: Russia must be stopped. Billions of pounds worth of weapons have been sent to help Ukraine fight back. With a unity that surprised many, western countries have imposed tough economic sanctions on Russia. But Ukraine says it needs more weapons, and more powerful ones, if it is to drive the Russians back across the border. Some observers do not think that’s a realistic aim in any case. The conflict has become bogged down and our own Prime Minister says 'we need to steel ourselves for a long war.' Global prices of food and energy have risen steeply, causing hardship in the west and the prospect of famine in Africa.

What should the west do now? Is it time to supply Ukraine with NATO's most powerful weapons, short of nuclear missiles? Must Russia fail and be seen to fail? Or should we, as the French President has argued, be offering Putin an ‘off-ramp’? In any case, is it practical - or moral - to behave as though the choice between war and peace can be our decision? With Paul Ingram, Orysia Lutsevych, Richard Sakwa and Edward Lucas.

Producers: Jonathan Hallewell and Peter Everett Presenter: Michael Buerk