“Russia is about to suffer 700,000 people killed or wounded – the enormous pain and suffering that the Russian nation is having to bear because of Putin’s ambition,” said Sir Tony.
He said the losses were for “for tiny increments of land”.
“There is no doubt that Russia is making tactical, territorial gains and that is putting pressure on Ukraine,” he said.
But he added that Russia is spending more than 40% of its public expenditure on defence and security, which he said was “an enormous drain” on the country.
While allies of US President-elect Donald Trump insist that Ukrainian President Volodymyr Zelensky may have to cede territory to bring the conflict to an end, Sir Tony insisted that Western allies would be resolute for “as long as it takes”.
“That’s the message President Putin has to absorb and the reassurance for President Zelensky,” he told the programme.
Trump has consistently said his priority is to end the war and stem what he characterises as a drain on US resources, in the form of military aid and financial support to Ukraine.
But he has yet to divulge how he intends to do so – and will likely be hearing competing visions for Ukraine’s future from his various advisers.