The BBC approached Cheema and Abdul Rehman, the new director listed for SC Parking Ltd, for comment and did not receive a response.

Uttlesford District Council said it was a complex case with "various agencies involved."

A spokesperson said the authority would continue to monitor the site and assess any new reports received to determine whether they fall within the scope of the existing enforcement notice.

Essex Trading Standards said it had not received enough complaints to justify a formal investigation.

Travel Extra Deals Ltd, which owns a comparison site used by some of the car park's customers, said it had issued the operator with a final warning and would stop sending bookings if further complaints were received.

The company said it would review unresolved cases, provide refunds where appropriate and offered an apology on behalf of the operator.

The BBC put customers' complaints to Park Pilot Ltd, the company named on customers confirmation emails as the service provider, as well as the writing to management at New Farm, but neither responded.

The Radisson Blu Hotel at Stansted Airport said it was aware of concerns. Its general manager, Dinesh Kunder, said: "We would like to stress, the hotel has no commercial agreement nor affiliation with this company."

Stansted Airport's managing director, Gareth Powell, urged customers to choose authorised parking providers, check reviews and report concerns to Essex Trading Standards via the Citizens Advice consumer helpline.