The Unite union called on Grangemouth workers yesterday not to cave in to the oil refinery bosses' "menacing" tactics to sign away their rights and said it was considering legal action.

Workers at the massive oil refinery were yesterday given details of owners Ineos's "survival plan," with the firm saying it was "D Day" for the site.

The company told workers they could lose their jobs and be re-employed on poorer terms unless they agreed to give up their final-salary pension, as well as accepting pay freezes and pay cuts by 6pm on Monday October 21.