G7 members are expected to ratify a wide-ranging security pact with Ukraine at the Nato summit in Vilnius on Wednesday.

However there is frustration in Kyiv about the perceived slow progress to full membership of NATO.

US President Joe Biden earlier suggested a model for Ukraine similar to his country's agreement with Israel. Under that deal, Washington has committed to providing $3.8bn (£2.9bn) in military aid per year over a decade.

But unlike Nato membership this does not include a clause to come to the target nation's aid during a time of attack.

Today’s Justin Webb spoke to Lord Peter Ricketts former UK permanent representative to Nato and Radek Sikorski, former Polish foreign minister. The BBC’s Europe editor, Katya Adler, reports from Vilnius.

(Image, Nato Ukraine flag, Credit, Valentyn Ogirenko, Reuters)