Unofficial word is that the next big broadly-anti-Brexit demonstration will be called for 20 July 2019, soon after the Tory leader election result is announced.
Confusingly - since the choices will then almost surely be sharper, with a harder-Brexit Tory leader under pressure from Farage - there is talk of billing the demonstration as something more diffuse, like "People's March for Change".
The previous big demonstrations, on 20 October 2018 and 23 March 2019, were billed as "People's Vote".
One factor, it is said, is tensions between the bigger "People's Vote" outfit, in which Alastair Campbell and Peter Mandelson have been prominent, and "Best for Britain", whose chair is George Soros sidekick Mark Malloch-Brown, but has sometimes pitched as a bit more leftish than "People's Vote".
Socialist campaigners for lower borders need to prepare to organise an independent, distinctive, visible, left-wing, working-class-oriented presence on the demonstration.