Russian President Vladimir Putin cannot be allowed to “play games” over the US-backed ceasefire proposal in Ukraine, Britain’s Prime Minister Keir Starmer said ahead of a key summit of European leaders.

In his opening remarks Saturday to a virtual gathering of what he has termed the “coalition of the willing,” Starmer said Putin will “sooner or later” have to “come to the table.” The call is expected to delve into how countries can help Ukraine militarily and financially as well as gauging support for any future possible peacekeeping mission.