Firmus is owned by Irish state company Bord Gais, and supplies gas to about 20, 000 homes and businesses across NI.

BBC: Irish government's 3bn euros sale

The energy division of Bord Gais and some parts of ESB, the state electricity company, are all likely to go up for sale.

BBC: Irish government's 3bn euros sale

Wrth ymateb i gais AC Delyn Sandy Mewies am ddiweddariad am ardal fenter Sir y Fflint, fe ddywed Ms Hart fod manylion pellach ar gael ar y wefan.

BBC: Cwestiynau Busnes

Phoenix is owned by private equity giant Terra Firma - the sort of firm that might be able to afford the likely one billion euro plus pricetag for Bord Gais Energy.

BBC: Irish government's 3bn euros sale

And Bord Gais also owns the gas transmission pipelines to the northwest and south which are not affected, but the distribution network to the 10 towns feeding off those pipelines is part of the likely sale.

BBC: Irish government's 3bn euros sale