Nato chief Jens Stoltenberg has just been speaking ahead of today’s summit.

He says that allies have provided support for Ukraine to help its “fundamental right to defence”, but again underlines that the military alliance’s core task is the defence and protection of Nato members.

Because Ukraine is not a member the alliance is not sending troops into the country, although it is increasing its military presence in neighbouring Nato countries.

Stoltenberg says Nato leaders will talk today about a “reset for our deterrence and defence in the longer term”.

“The first step is the establishment of four new battlegroups in the eastern part of the alliance, in Bulgaria, Romania, Hungary and Slovakia,” he says.