" 
 *Comment. The page does arguably cover a discrete sub-topic, relevant to factional disputes and categorisation in the British Labour Party in the 1980s. It's not just a general term or one that is synonymous with far/radical left. That's the way the page is currently structured, and the term is found with this discrete and specific usage in plenty of serious sources. I'd also suggest that the sources in that link cast doubt on whether it is, unequivocally, a pejorative term. ''' /''' "