Royal Mail's guardian agency has reported £748m in annual working losses, pushed by the disaster inside the UK enterprise that was dogged by strikes and poor efficiency.

International Distributions Services (IDS) laid the blame squarely on the foot of Royal Mail, which was within the crimson to the tune of simply over £1bn throughout the 12 months to 26 March in comparison with income of £250m the earlier 12 months.

Its efforts to bolster parcel supply competitiveness in return for the next pay rise fell foul of its unionised frontline workers who have been at loggerheads with bosses all through the interval.

Royal Mail had already mentioned that the year-long battle with the Communication Workers Union (CWU), which culminated in its core Christmas season being largely destroyed by industrial motion, had value it greater than £200m.

A settlement was reached within the New Year which the union really helpful to its 112,000 members in April. A poll is pending.

Earlier this month, Chief Executive Simon Thompson give up. The CWU had laid the blame on him for the monetary hit of business motion.

He had been in talks to go away the corporate after his credibility was challenged by MPs who recalled him for questioning on the Business, Energy and Industrial Strategy (BEIS) committee.

He was accused of giving "inconsistencies" in evidence earlier than the committee, together with over the monitoring of workers efficiency.

Royal Mail has additionally since admitted it might face another fine from the trade regulator for lacking key supply targets.

A ransomware gang linked to Russia was chargeable for hurting Royal Mail's operational efficiency.

A cyber assault suspended worldwide postal deliveries for weeks and took the corporate months to recuperate.

While the headline working loss grabbed consideration, the underside line efficiency was higher than the market had anticipated as adjusted losses got here in at £419m.

Read extra from enterprise:Water firms apologise for sewage spills and splash £10bn to clean up their actNo evidence supermarkets are profiteering - and this is why

A bunch adjusted working lack of £71m in contrast with a revenue of £758m in 2021/22.

IDS mentioned Royal Mail would stay within the crimson, on the identical foundation, within the present monetary 12 months.

Chairman Keith Williams mentioned: "There is now a clear path towards a more competitive and profitable Royal Mail, delivering improved services for our customers whilst further reducing our environmental impact.

"Importantly, if ratified, the CWU settlement offers higher job safety and elevated rewards - via each pay and revenue share - for our staff. Successful supply of the settlement shall be key.

"Quality of service has been significantly affected by industrial action and high levels of absence. I am sorry that we have not delivered the high standards of service our customers expect. Improving quality of service is our top priority."

The firm confirmed that the Royal Mail drag, and its plans to spend money on its worthwhile GLS parcels division, meant it will not pay a remaining dividend.

Shares have been greater than 5% down on the open.

The CWU, which had initially fought for increased pay partly on the grounds of Royal Mail's profitability, admitted it was going through a "very serious financial situation" now.

"It is one of its own making due to gross mismanagement, but it is serious nonetheless," a spokesperson mentioned.

"We now need to see actions rather than words.

"The poisonous surroundings created by a senior administration crew that has gone to conflict with its personal workforce wants to finish instantly.

"In recent weeks, there has been no let up on the culture of imposition, disregard for quality of service and the destruction of the service to the public.

"Royal Mail Group is at a crossroads. It can't and won't survive with out taking the workforce with it via this era."