It is believed that Trinny, who has been seen dining with Charles several times, was unaware about the message written in the dust on her car.
While Trinny, who rose to fame presenting What Not To Wear with Susannah Constantine, drove herself home, art collector Charles decided to travel by cab.
Over the part few weeks 49-year-old Trinny and Charles, 70, have spent time together at the exclusive restaurant in Mayfair, despite it being the location for the incident involving Charles' former wife Nigella Lawson, which led to their divorce.
The duo sparked rumours that they were an item when Trinny drove Charles home from a date earlier this week.
The TV stylist was pictured driving away from Scott's restaurant in London with Charles in the back of her car.
They had enjoyed a meal together at the upmarket Mayfair restaurant with a friend – then left separately before the mother-of-two presenter picked up the advertising mogul.
The outing marked the third time that Trinny and Charles have been to the restaurant together in the past couple of weeks.
There has been no official confirmation of a romance between the pair, who are both divorced.