When customers complained, Főgáz refused to replace the metres with smaller ones, he added. Some 2,000 blocks of flats could be affected by the practice, which has gone on for years, he said. Lázár declined to estimate the value of the compensation.

He said legislation would be introduced requiring gas distributors to install metres appropriate for the volume of gas consumed in a building. In March, Lázár said the state had discovered data suggesting metering and billing manipulation at Főgáz when it conducted due diligence on the company before acquiring it.