13 April 2011
The 430 GMB union members were locked out of the BP bio fuel ethanol works at Saltend in Hull on 14 March.
Their employers - Redhall Engineering Solutions failed to meet performance targets in their contract.
The workers were promised jobs with the company that replaced Redhall - but that did not happen.
Vivergo fuels - a joint venture between BP, British Sugar and Dupont - runs the Saltend site.
So the locked-out workers and their supporters will protest at the BP shareholders' annual meeting at the Excel Centre in east London.
PCS general secretary Mark Serwotka said: "Please convey the best wishes of PCS to the 430 workers that have been locked out since 14 March.
"This disgraceful treatment highlights two important truths: firstly the need to campaign for better trade union and employment rights in this country; and secondly the importance of every worker to be part of a fighting national trade union and to be well-organised locally.
"Major global companies like BP cannot hide behind subcontractors and it is absolutely right that you are taking this public action to shame this company into recognising its duties to this group of workers.
"On behalf of the whole union I wish you the best in your struggle for justice."