A group of British lawmakers and public figures, including former Labour leader Jeremy Corbyn, MP Diane Abbott, and legendary musician Brian Eno, has called on the US and UK to de-escalate the Ukraine conflict. The appeal comes after Washington and London allowed Kiev to launch long-range missile attacks deep into Russian territory.

In an open letter published by The Guardian on Tuesday, the group expressed deep concern over the growing risk of a much larger conflict. “This rapid escalation seriously threatens an all-out military confrontation with Russia and NATO,” they wrote.