The former What Not To Wear presenter, who arrived at the party sans entrepreneur husband Johnny Elichaoff, seemed determined not to let rumours of marriage problems spoil a good night out.

The stick-thin fashionista, 44, left guests bemused as she leapt into photographer chum Amanda Eliasch’s Mini to grab a lift home.

“She’s known for her demure, sophisticated style but her behaviour at the party was all over the place,” remarked a guest.

“She was acting like an excitable teenager on a rare night out.”

Last month the nine-year marriage of recovering alcoholic Trinny was reported to be on the rocks.