It continued to win over established and emerging Socialist League minority tendencies and disaffected branches for several years.

[1] Its publication was "Socialist Viewpoint", its best-known member was Alan Thornett, and it had significant bases in Oxford and Coventry.

The two groups merged in order to re-establish a British Section of the Fourth International after a breakdown of the Socialist League.

It began with a minutes silence to salute three Trotskyist leaders and eight Provisional IRA volunteers who had died in the preceding year.

The merged organisation drew together over 300 activists initially, and led important rearguard battles against Labour council cuts in a number of areas, notably Haringey in North London.

[3] Reflecting the support of the Fourth International for the European Anticapitalist Left, the ISG joined Respect coalition in England and Wales.

The Group called for a first preference vote for the Green Party candidate, the eco-socialist Siân Berry, in the 2008 London mayoral election.