Given that due to First Past The Post the current government has a Parliamentary Majority with only 34% of the votes cast, in a country without a written Constitution and thus were a simple Parliamentare majority is enough to change any Law.
The whole idea that there was much in the way of Democracy in Britain to begin with is a bit iffy: having a vote which only lets you choose between two carefully selected options isn't actually a Free and Fair choice.
Also the idea that Starmer is in any way shape or form left of center - by global standards of Leftwing, rather than by "pick the middle between the Tory Party and the Labour Party and call it center" - is hilarious.
I lived in Britain for over a decade from 2006 until Brexit and the only Leftwing party there during that period was the Greenparty, as by the time I arrived in 2006, Labour Party politics were already purelly those of Thatcher's Greatest Achievement.
By broader European standards Britain has long been very right wing, which explains why even the Brexiter Tories with their anti-immigration rightwing populism weren't rightwing enough for the 10% or so of people who voted Reform.
I was thinking Germany.