I take it that would be the Socialist Party of England and Wales then, whose history of having joint campaigns is legend?
the smear artist can't resist a little sectarian dig can he lol
.. imho while it was hard to work with Militant ( though we did over the poll tax )it is easy working with the SP, examples are the NSSN .. their whole collapse and reformation appears to have made them a genuinely less sectarian organisation, unlike the swp