While one model was making her comeback at Couture, another was making her debut on the catwalk yesterday. Ex-Moloko singer Roisin Murphy was already buzzing with excitement when she revealed her plans to take to the catwalk backstage at the British Fashion Awards months ago. But the night before her debut she seemed remarkably calm. ‘I've never really modelled before, but how hard can it be?' Roisin chirped. And she certainly looked in control as she strode down the catwalk of Alexander Vauthier's show last night. Wearing first a belted navy draped gown with sharp shoulders and then one of the showpieces of the collection, a sheer white dress embellished with flecks of gold paint and crystals, she kept her eyes forward and focused. But backstage she was apparently elated at achieving her long-held fashion ambition. So which catwalk will be next? And what will we do without Roisin's constant presence on the front row?