The Earl of Halsbury ([Hansard] 1986 p310) spoke of how he had been ‘warned that the loony left is hardening up the lesbian camp and that they are becoming increasingly aggressive'.

1988: John Twitchin, Introduction to The Black and White Media Book
The term ‘anti-racist' has become associated with ‘left-wing sentimentality', not to say ‘loony left extremism'.

I sold the story to The Sun for school funds. They led with TROUBLESOME TOT over another piece about LESBIAN LOONY LEFT IN RIOTS.

They claimed that the London Boroughs Grant Scheme should be eliminated so that ‘public money' would no longer be spent on ‘"loony left" projects such as black lesbian groups'.

The exaggerations of the Thatcher [Conservative] governments, and the fabrications of the tabloid press, concerning the measures invoked by certain Labour councils in order to tackle discrimination and disadvantage led to coinage of the term 'loony Left'. The Government and its allies in the media ridiculed and reviled the principles and policies of such Labour councils, leading people to believe that one would not be allocated a job or house unless one was a disabled vegetarian single-parent lesbian from an 'ethnic minority' background.

The republican resolution was an example of the influence of the 'loony left' in the Labor Party.

[Political correctness] flourished for a while in what became known as ‘loony left' local authorities where public policies passionately favoured minority needs, the dubious as well as the deserving.

[Linda] Bellos, who was active in promoting lesbian rights as well as supporting black community initiatives, was depicted as the embodiment of the ‘loony left' and her commitment to opposing racism, sexism and homophobia was caricatured.

The Christic Institute, the looniest fringe group of the loony left, which publicised a number of bizarre conspiracy theories in which virtually every ill on earth could be traced to "secret teams" at the CIA involved in the narcotics trade.

In most cases, they follow not the loony left in the Legislature, but Bush's biggest California backer, Governor Arnold Schwarzenegger

Loony left

Meaning

Noun