A new broad left party founded upon a call launched by Ken Loach, in the wake of his film "Spirit of '45". I haven't seen that film yet (about the NHS and many other stunning achievements) nor do I know much about this new party, except that no pre-existing group seems to dominate and there seem to be many new members:
http://www.newstatesman.com/politics/2013/09/why-left-unity-could-become...