SOLIDARITY MOMENT: At the Christian Lacroix party on the rooftop of London’s new Mondrian Hotel Monday night, the brand’s creative director Sacha Walckhoff sported a “Je Suis Charlie” T-shirt under his Lacroix jacket in a tribute to the Parisian satirical magazine Charlie Hebdo, the target of a terrorist attack last week. The previous day he’d attended Paris’ Unity march for the victims of the terrorist violence in Paris. “The great thing was to see that Paris is still there, and stronger than ever, and all its creativity is being both preserved and reinforced,” he said. “You knew why you were French.” The party, during London Collections: Men, showcased a series of photographs shot for the house by Brendan Freeman. They star the model, choreographer and dancer Anders Hayward, who appeared alongside Romeo Beckham in the recent Burberry campaign.