Union officials have dismissed the Government-ordered independent inquiry into industrial disputes as politically motivated and a distraction to the "cost of living crisis".
A Unite spokesman said: "Vince Cable may not have noticed but the Grangemouth dispute has been settled. This review is nothing more than a Tory election stunt which no trade unionist will collaborate with."
GMB general secretary Paul Kenny agreed, saying the announcement "seems like another sop to the Tory backbenches".
He said the "real scandal at Grangemouth" concerned the chairman of the refinery's owners Ineos, Jim Ratcliffe, and how he was "able with impunity to hold the country to ransom".
More top news
Many council tax bills could be increased by almost 4% but councils warn that this still won't be enough to avoid cuts to services.
The Foreign Secretary raises the plight of the Yemen people in a speech to Gulf leaders days after his Saudi Arabia 'proxy wars' comment.
Yahya Jammeh, who has ruled Gambia for more than 22 years, says he no longer accepted defeat in the country's presidential election.