Manchester City are confronting what a leading lawyer describes as "substantial hurdles" as they pursue their appeal against a verdict that found them guilty on all charges of breaching the Premier League's financial rules.

The club were found guilty of violating financial regulations across nine seasons — from 2009-10 through to 2017-18 — and of engineering "sham contracts" that inflated sponsorship revenues by £830 million. City have dismissed the ruling outright, insisting they possess "irrefutable evidence" that the decision "contains clear material errors, of law, principle and fact, and is unsafe."

The standard City must meet

James Severn, a Partner at Penningtons Manches Cooper and Member of the London Solicitor Litigation Association, told BBC Sport that the appeal is not a fresh hearing where a new panel simply reconsiders the evidence from scratch.

"City will need to identify a material error of law, principle or fact, or serious procedural unfairness, which materially affected the Commission's decision," Severn said. He noted, however, that the Appeal Board carries broad powers — including the ability to vary any decision or make whatever order it deems appropriate.

The sponsorship dispute at the heart of the case

Central to City's appeal is their contention that payments made through key sponsors — including Etihad Airways — originated from the United Arab Emirates government as a shareholder, rather than from the club's owners as top-up funding. City maintain that government documents fully support this position.

However, Severn cautioned that if those documents were already placed before the Independent Commission, they carry limited additional weight in an appeal setting. "The bank statements, government records and contemporaneous payment documents could be powerful evidence if they establish a clear audit trail," Severn explained, "but if that evidence was already before the Commission, which nevertheless concluded that the arrangements were a sham, City will face an uphill struggle."

Complicating matters further, Etihad Airways had stated in 2015 US court documents that the Abu Dhabi government had not funded its Manchester City sponsorship. City argue that statement lacked full context and cannot be treated as proof of inconsistency on their part.

Shortly before the appeal was confirmed, Etihad Airways issued a statement claiming it was never given the opportunity to present relevant information to the Premier League during proceedings. Severn, however, said that complaint "does not, of itself, establish procedural unfairness."

Football Leaks emails and the factual error argument

City are expected to argue that the Independent Commission placed excessive reliance on emails obtained through the Football Leaks files. Severn said that if City can demonstrate the Commission "fundamentally misunderstood the emails, failed to consider their proper context or reached conclusions inconsistent with other contemporaneous documents, that could amount to a material factual error."

Kieran Maguire, professor of football finance at the University of Liverpool, told BBC Sport the Commission found that "the documents were retrofitted to fit the crime" — a finding that suggests the panel was deeply sceptical of City's witness testimony and documentary evidence.

Maguire raised one possible avenue: if City's legal team can demonstrate that the composition of the Commission itself was flawed — given that its members were selected by the Premier League rather than the club — an argument of structural bias could emerge. He acknowledged, though, that such a claim "seems remote."

A long road ahead

Despite Premier League regulations requiring an appeal to be heard within 12 weeks — by Christmas Eve at the latest — Severn warned that "given the scale and complexity of the proceedings, a final outcome may not be known for some time."

Maguire believes there remains "a route" for City, suggesting their lawyers may pursue what he called a "mess and noise approach" — focusing on discrediting the Commission's process rather than the evidence itself. "From an accounting point of view," Maguire said of the Abu Dhabi documents presented in the New York case, "they can be seen in more than one way."