There is no left in the UK.
Labour isn't left and is proud not to be. They are totally torified, all about following the money market, etc..
There certainly is a progressive left. TRAs etc., aren't left. They are culture warriors, taking up trans issues on a shallow basis that somehow it is left.
In a way they know they are pointless, and constantly go over the top to try and compete with former issues, such as Section 28, which shows they neither understand history, nor (which as we all know isn't a surprise) that trans rights as trumpeted by TRAs are an attack on women's rights.
What has changed, and quite honestly it started with Thatcher is the "there is no such things as society". Everything now is about the individual.
Do you remember (and sorry cant remember his name) how the MSM got totally obsessed by the train union's leader because he didn't have a middle class voice. It was extraordinary.
That is how far the country as a whole has drifted from the (proably impossible) vision of post war Labour, which the 60s were the decade when it seemed to be bearing fruit. ie more working class people had been to university, were welcomed into the elite art world etc.. Then we had the 70s, and it been downhill since then.
And much as I like to blame politicians, and politicos, you have to wonder why so many people in the country have just accepted the drift right. The americanisation of attitudes and way of looking at the world.
For anyone who is interested in easy to digest history, and you have the time, try listening to this series about UK politics directly after WWII when may people thought there could be a progressive / left consensus and compare it to what it has become. BBC Radio 4 - Politically, Postwar, Trailer