Russian President Vladimir Putin has reportedly told German Chancellor Angela Merkel that he decided to send a humanitarian aid convoy into Ukraine because he could no longer wait.
According to the Kremlin account of the phone call, President Putin expressed "serious concern" about the military escalation in eastern Ukraine.
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MPs say there must be no way back for the former London mayor as he hints he could seek to rejoin the party.
High pressure will help keep conditions relatively quiet through the course of this week.