The two groups will receive 6.5 per cent and 5.5 per cent respectively during the first 12 months of the period covered. Overall, the increases will be paid in six instalments.

Members of the union will be balloted on the agreements in the coming weeks.

Commenting on the An Post deal, CWU general secretary Seán McDonagh said he believed the increases agreed were recognition of “the essential contribution of workers to the transformation of the company”.

He said the agreement with Eir included provisions to address issues of work-life balance, progression to management grades and improved pay for apprentices.

He described both as “the culmination of difficult and protracted negotiations against the backdrop of high inflation, higher interest rates and increased pressures on household budgets for ordinary workers trying to support themselves and their families. We had ground to make up which I believe we have in the agreements we are recommending to members.”

About 500 delegates are due to attend the CWU conference which will debate motions on a wide of issues relating to the communications sector including one on Wednesday aimed at protecting postmen who refuse to deliver letters from Israel from disciplinary action, the protection of five-day deliveries and the retirement age at Eir.