The Irish Times has details of a 'secret' memo sent by then Minister for Communications Jim Mitchell addressed to the Government that questioned the judgement of then Finance Minister Alan Dukes in forcing the wind-up of the company.
According to Mitchell, there was "considerable merit in keeping ISL in operation until the end of 1985" despite requiring a further £20 million in State funds.
But another letter in the papers, this time from Dukes to Mitchell, argued that the memo represented "a direct questioning of my authority and competence".
ISL was eventually liquidated on 14 November 1984, a date marked by a reunion of former employees in Dublin last month.
The Irish Times has more on the story HERE.