Britain's outgoing spy chief, Richard Moore, warned Friday that Russian President Vladimir Putin has shown no intention of negotiating peace with Ukraine.

The building housing the Britain's MI6 is seen by the river Thames in London. On Friday, outgoing MI6 chief Richard Moore said Russian President Vladimir Putin has no interest in negotiating peace with Ukraine because he doesn't recognize the former Soviet republic's sovereignty. File Photo by Facundo Arrizabalaga/EPA UPI

Sept. 19 (UPI) -- Britain's outgoing spy chief, Richard Moore, warned Friday that Russian President Vladimir Putin has shown no intention of negotiating peace with Ukraine because he doesn't view the former Soviet republic as having its own sovereignty.

Moore made the remarks at the British consulate in Istanbul as he prepares to step down from his role as chief of the Secret Intelligence Service. He has led the organization, also known as MI6, for five years.

"I have seen absolutely no evidence that President Putin has any interest in a negotiated peace short of Ukraine capitulation," Moore said as he address efforts by Britain and the United States to broker a deal to resolve the conflict.

Putin "is stringing us along," Moore added. "Because the issue ... has always been sovereignty: Putin denies Ukraine's sovereignty and its very existence as a country and nation."

Moore said Putin has attempted to portray that Russian victory over Ukraine is "inevitable," but accused the president of lying to his people and the world.

"He seeks to impose his imperial will by all means at his disposal," Moore said, adding that Putin doesn't have the ability to take Ukraine by force.

"Bluntly, Putin has bitten off more than he can chew. He thought he was going to win an easy victory. But he -- and many others -- underestimated the Ukrainians," Moore said.

"Indeed, Putin's actions have strengthened Ukrainian national identity and accelerated the country's westward trajectory, as well as persuaded Sweden and Finland into joining NATO."

Moore chose Istanbul for his farewell speech because he said Turkey is of "pivotal importance" to the international community.

"On almost all of the issues that I have grappled with as chief of MI6, Turkey has been a key player," he said.

Moore spent eight years living there, including four as British ambassador from 2014 to 2017. He also studied in the country as a student and his daughter was born there.

Upon Moore's departure later this month, MI6's current technology lead, Blaise Metreweli, will take over as head of the organization. She will be the MI6's first female chief since its founding in 1909.