there's a lot of posturing going on at the moment. moscow saying nato's ignoring its security concerns as it continues its troop build—up on the border. the response from the west is increasingly alarmed, and alarming. this is perilous geopolitical terrain and ukraine is trying to chart a course through it. there may yet be what they call an �*off ramp�*, a way of defusing the crisis, but there's a danger that talk of all—out war becomes a self—fulfilling prophecy. gabriel gatehouse, bbc news, western ukraine. a senior british civil servant is expected to deliver her report on lockdown parties at downing street to the the british prime minister soon, without waiting for the police to finish their investigation. scotland yard has made it clear that it has not delayed the report's publication. here's our political correspondent, iain watson. which rules could have been broken behind the famous black door