Mostly that article just tells you that Matthew Parris is extremely right-wing these days. But then he's started to openly advocate for eugenics so, no surprise.
I'm an armchair observer from overseas, obviously, and a left-wing one to boot, but it looks an awful lot to me like the Johnson government only seems "leftist" compared to the towering hard-right Thatcher legacy and the (overstated and mildly unfair) Blair-Brown reputation for capitulating to that legacy. I can't think of anything they've done that's made stateside news that would have been out of place for an early- or mid-twentieth-century Tory government, except maybe for some of the authoritarianism-adjacent policing/Home Office stuff.
I mean the Blair and Brown governments were a mile to the left of the Johnson government. Almost everything 'left-wing' that Parris is screaming about was just standard practice then and abandoned during the Cameron-Osborne era.
Massive government subventions to private corporations spun as investments in welfare, creeping authoritarianism in immigration and crime policy, kowtowing to the finance sector, lip service to LGBT+ people that aren't affluent white men, Atlanticist foreign policy in service of thinly veiled neo-colonialism, and laughably shallow commitment to government/ministerial accountability.
Please tell me which regime I've referred to.