Utility Regulator comment on firmus energy's gas tariff announcement 03/02/2021 | 01:34pm EDT Send by mail : Message : Required fields firmus energy has today announced a 17.75% increase to its regulated gas tariffs for domestic and small business customers[1] in the Ten Towns area. This change in tariff will be effective from 1 April 2021. Commenting on the announcement, John French, Utility Regulator Chief Executive said: 'In February 2021, firmus energy submitted a request to the Utility Regulator to increase their Ten Towns regulated tariff by 17.75% or £78 per year. Following a detailed regulatory examination of the company's gas purchasing strategy, operating costs and regulatory reserves[2], we have accepted firmus energy's submission.