So this is what you were getting at rather than an idea of elitism? What exactly, then is the Islington thought process and political ideology as separate from Marxism, say?
You have the leaders of a movement based in London, such as Corbyn, McDonnell et al, directing traffic to general 'believers' in the grassroots who identify as 'socialists'.
Similar to how Lenin/Trotsky in Islington and the Bolshevist movement. In fact, very similar - again it comes down to revolution against reform; it worked in the early 20th century in Russia, it doesn't work now because the poor and working class are in no way whatsoever the same in the UK. People don't want revolution; they want structured reform.