Red Bull is set to subject their racing chief to scrutiny by a lawyer following allegations of “inappropriate behaviour” made by a female colleague.
The accusations are believed to pertain to his management approach. Mr Horner, who is married to Spice Girl Geri Halliwell, refutes the claim.
Originally slated to take place at the team’s Milton Keynes headquarters, the hearing will now occur at an undisclosed venue due to heightened media attention.
Mr Horner, aged 50, will face interrogation from an independent KC, with The Times indicating that it may be conducted at the lawyer’s premises.
In the interim, he has continued to work alongside the female colleague awaiting questioning.
This week, he participated in filming for the unveiling of the new Red Bull F1 car on February 15, a date by which the Austrian outfit hoped for resolution.
Management anticipates a resolution before the commencement of the new season in Bahrain on March 2.
The team stated earlier in the week: “Upon being apprised of recent allegations, the company initiated an independent inquiry.
“This investigation, presently underway, is being conducted by an external specialist barrister.
“The company views these allegations with utmost seriousness, and the investigation will conclude at the earliest feasible juncture.
“Further commentary is deemed inappropriate at this juncture.”
Despite their recent dominance in the sport, which witnessed their car outperforming all rivals and Max Verstappen securing successive drivers’ championships, the allegations have cast a shadow over the team ahead of the new season.