Marx Memorial Library and Workers School : Contains a large collection works on socialist, communist and trade union history theory etc… They run a number of lectures through out the year on working class topics along with a highly recommended online course “Trade unions, Class and Power”.
Morning Star : The Daily paper of the CPB run as a co-operative and highlights the work of the trade unions in Britain along with political and economic news in relation to the working class.
The Communist Party of Britain (CPB) : The “official” communist party of Britain
Young Communist League (UK) : The Youth wing of the CPB but acts as an independent political body.
The Next Recession : A very good blog from a Marxist economist regarding current economic events.
Trade Union Council (UK) : Council representing the trade unions in Britain, they have a good education section on their website regarding skills needed to for trade union work.
Marxist Internet Archive : A large archive of Marxist works
Marx2Mao : Another source of Marxist works, especially Maoist works.
Marx in the Carparx 