Actor and style icon Sienna Miller has been back in London for a year and has been working on a highly anticipated collection for M&S. A fan of undone, relaxed British style, the collaboration comes following a partnership last autumn when Miller fronted a successful campaign for the high street stalwart.

Initially planned as a 15-piece capsule collection, the range quickly gained pace and the final result is a 33-piece collection of covetable dresses, blouses, denim, swimwear, high summer separates and accessories.

The high-summer collection is a holiday capsule of sorts and includes everything you would need for a sunny getaway, such as a sarong inspired by a piece her father gave her, backless mules and a printed silk mini dress. However, the stand-out piece is the broderie blouse that Miller wore this week at the press launch for the collection. It’s a vintage-inspired, off-white piece that Miller worked especially hard on – and you can tell.

“I’m a fashion editor and this is my favourite piece from the M&S x Sienna Miller collection”