Sitrep assesses how the 30-day ceasefire, offered by Ukraine, could work in reality.  Would troops just stay in place and dig in, or might they have to pull back from a buffer zone?

It is a tactical trade-off by Kyiv which gives it back US military aid and intelligence, and forces Russia onto the diplomatic back foot.

Professor Michael Clarke explains which side has most to gain from a pause to rest and re-equip while former head of the Army, General Lord Dannatt, shares lessons from Bosnia suggesting even the most junior soldiers will have to fully understand the terms of any deal.

Kate and Mike also talk to former UK National Security Adviser Lord Peter Ricketts to assess the UK’s role in getting to this point, and the possibility of British troops being part of any longer-term peace plan.