Former XL Leisure boss Phil Wyatt and his co-defendants lodged their appeal on May 10, while Turkish airline Onur Air did the same on February 19. Wyatt had previously said his legal team was considering the option.

Should one or both be successful, new hearings would need to take place at the highest court in the UK.

A spokesperson for the court said that a decision on whether or not they would proceed to a full hearing had yet to be considered. A panel of three justices will run the rule over each request with a decision on each case not likely until the autumn.

In April, judges in the Court of Appeal rejected an attempt by Wyatt and co to overturn an earlier ruling ordering them to pay £1.4 million to Goldtrail’s liquidator PricewaterhouseCoopers (PwC).

Onur Air had had their own attempt dismissed in January for “procedural reasons”, having earlier been found liable to pay compensation of £3.6 million.

Goldtrail, which was owned by Abdulkadir Aydin, collapsed in 2010 leaving thousands of holidaymakers stranded abroad and costing the CAA around £20 million in the process.

A 2014 ruling found Wyatt, together with Magnus Stephensen and Halldor Sigurdarson and an entity called Black Pearl Investments Ltd, along with Onur Air, dishonestly assisted Aydin’s breaches of “fiduciary duty”.

Aydin is now believed to be dead.

The Court of Appeal ruling earlier this year largely backed up the previous decision, disallowing all but 2 of 12 grounds of the appeal.

Lord Justice Vos also rejected the  claims from some defendants that the previous judge “behaved unfairly”.

“The judge plainly took a dim view of the appellants’ fraud, but that did not lead her to conduct the trial unfairly or in any respect inappropriately. Moreover, I think she was entirely justified in adopting the censorious view she took of the appellants’ conduct in this unhappy matter,” he said.”