(Reuters) — Two former directors of Tesco PLC have been acquitted of fraud and false accounting at Britain’s biggest retailer after a 2014 scandal, dealing a major blow to the U.K. Serious Fraud Office.

Christopher Bush, 52, who was managing director of Tesco U.K., and John Scouler, 50, who was U.K. food commercial director, had been accused of wrongdoing to support Tesco’s share price and secure huge compensation packages.

The case, brought by the SFO, stemmed from an overstatement of Tesco’s profit forecast of more than £250 million ($318 million) in 2014.

However, on Thursday, Judge John Royce told a jury at London’s Southwark Crown Court that the men had been acquitted by the Court of Appeal on Wednesday.

He said the Court of Appeal concluded that his judgment at the mid-point of the trial that the defendants had no case to answer was correct and refused the SFO permission to appeal.

“I concluded in certain crucial areas the prosecution case was so weak it should not be left for a jury’s consideration,” Judge Royce said before discharging the jury.

Messrs. Bush and Scouler were charged in September 2016 with one count of fraud by abuse of position and one count of false accounting. A first trial was abandoned in February, shortly before the jury was due to retire to consider its verdict.

The retrial had been running since October.

Serious questions

“While I am delighted that my innocence has finally been established, it is troubling that Mr. Scouler and I were ever charged,” Mr. Bush said in a statement.

“Put simply, these charges should never have been brought, and serious questions should be asked about the way in which the SFO has conducted this investigation. In my view, the SFO wholly failed to investigate this case thoroughly, independently or fairly from the outset.”

Richard Sallybanks, Mr. Scouler’s lawyer, also said his client should not have been charged, and the SFO should not have proceeded with the trial.

A third defendant, Carl Rogberg, 51, a former Tesco U.K. finance director, was not included in the second trial. The SFO said it was considering whether to pursue a retrial of Mr. Rogberg.

On Sept. 22, 2014, Tesco issued a statement to the London Stock Exchange saying that during its final preparations for an interim results announcement, it had identified a £250 million overstatement of its expected profit for the half-year, mainly due to booking commercial deals with suppliers too early.

In the following weeks, Tesco suspended eight senior members of staff including Messrs. Bush, Scouler and Rogberg. Its shares tumbled and the retailer was plunged into the worst crisis in its near 100-year history.

The profit forecast overstatement, identified three weeks after Dave Lewis took over as chief executive from Philip Clarke, was later raised to £263 million.

The forecast related to guidance published by Tesco in a trading update on Aug. 29, 2014, downgrading its outlook.

Tesco has said it is a different company now, having transformed its business under Lewis. It declined to comment on Thursday.