The GMB said the staff voted overwhelmingly for industrial action after being told their hours would be increased from 37.5 to 45 hours a week with no additional pay.
'Unacceptable proposals'
Mick Conroy, of the GMB, said: "The company proposals are completely unacceptable. Asking people to work an additional 7.5 hours for no additional pay is equivalent to a cut in hourly pay rates of 20%. It will not be accepted by GMB members.
This is why they call it the dictatorship of the proletariat.
http://www.bbc.co.uk/news/uk-scotland-scotland-business-13726160