Ray Tindall from Chester has spent nearly four years in a jail in India and now Foreign Secretary Boris Johnson says the UK will "leave no stone unturned" to bring him and five other men home. Mr Johnson is facing fresh pressure over the issue.
Former Foreign Office minister Sir Hugo Swire said it is time the ex-soldiers, referred to as the "Chennai Six", were brought back. He suggested the Foreign Secretary meets the chief minister in the state where they are being held to find a solution.
Chester Labour MP Christian Matheson also appealed for help, telling Mr Johnson to "do a deal" and ensure he can have a pint with his consitituent Ray Tindall before the summer is out.
The men were working for US maritime company AdvanFort providing anti-piracy protection when their ship, MV Seaman Guard Ohio, which had a crew of 35, was detained and weapons were found.
They were arrested on illegal weapons charges, which were dropped in the following months, but an appeal followed from the Indian authorities and the men were later convicted and sentenced to five years in jail.
The Prime Minister Theresa May raised their plight with Indian Prime Minister Narendra Modi at the recent G20 summit.
As well as Ray from Chester and Paul Towers who is originally from Bootle the other men involved are Billy Irving, from Connel, Argyll and Bute, Nick Dunn, from Ashington, Northumberland, John Armstrong, from Wigton, Cumbria, and Nicholas Simpson, from Catterick, North Yorkshire.