But H&M, known for partnering up with high fashion designers, has changed course with Matthew, making his collections its most accessible to date. Karl Lagerfeld, Stella McCartney, Viktor & Rolf and Madonna's visiting collections were always launched in winter in 200 stores globally. Matthew has done two summer collections for H&M, one of which - full of iconic pieces like the cocktail dress, the jumpsuit, the leather jacket - hit 200 stores last month and sold out within the first half hour. But his second collection went on sale yesterday in 1,200 shops. 'It's a global outreach,' he pronounces. 'Whether you live in Kuala Lumpur or Croydon, you'll be able to access it and it's very celebratory. It's intended to be the perfect summer wardrobe so you have kaftans, swimwear, T-shirts and lots of denim.'