Absolutely insane article. It sounds like he thinks putting British troops in Ukraine will push Russia back out of the Donbas. They're going there as peacekeepers, not to "secure a decisive victory".
Considering Russian warfare, I'm assuming it'll be less than 24 hours after we set a peacekeeping camp before Russia bombs it and tried to claim it was Ukraine.
Sending UK troops to Ukraine would not be an escalation, it would be a justified response in the same way that North Korean troops are in that same theater of war.
Russia seems to want to threaten World War 3. Is that the rhetoric you're using as well?