Christian Horner was booed by fans during the F1 75 Live event at London's O2 Arena on Tuesday, 18 February.
As Red Bull unveiled their 2025 car livery, the CEO and team principal walked on stage to introduce their 2025 challenger, the RB21.
Horner told the crowd: "Is that, well... It's fantastic to be here in the O2 anyway so I hope you're all having a good evening."
The 51-year-old was sacked as Red Bull F1 boss on Wednesday, 9 July, having led them to six constructors’ titles and eight drivers’ crowns. He was replaced by Laurent Mekies.
Red Bull’s Oliver Mintzlaff said in a statement: "He has been instrumental in establishing Red Bull Racing as one of the most successful and attractive teams in Formula 1.
“Thank you for everything, Christian, and you will forever remain an important part of our team history."
