More than 2,000 engineering construction workers in the Unite and GMB unions at seven petrochemical plants and power stations are set to vote for an official strike over jobs.
The ballot follows months of unofficial action across the country. It starts on next Tuesday and a strike should follow in early September.
The last dispute at the Lindsey Oil Refinery in Lincolnshire won through unofficial solidarity by workers at scores of sites across the country.
That’s why all sites must be shut down on the day of the strike including at the Olympics regardless of whether they have been balloted.
The seven sites to ballot are: Ineos’s Grangemouth oil refinery in Scotland, Shell’s Stanlow refinery in Cheshire, BP’s North Sea oil processing terminal at Grangemouth, Sellafield nuclear plant in Cumbria, RWE’s power stations at Staythorpe in Nottinghamshire, Aberthaw in South Wales, and Chevron’s refinery in Pembroke, west Wales.