It’s a season of exciting collaborations and launches, with some of our favourite celebrities and designers releasing a colourful, joyful mash-up of brilliant summer must-have fashion pieces.

Style icon Sienna Miller launches her first collaboration collection of summer womenswear and accessories for high street favourite Marks & Spencer this week. The collection is a 33-piece showcase of vintage-inspired separates, beautiful high-summer separates and some great summer event dress options. Miller says: “I have always had a genuine love for M&S – it’s a brand that is part of the fabric of British life and holds special associations for so many people. Seeing the reaction to the autumn campaign that I fronted was phenomenal. To collaborate on a womenswear design project made total sense. I can’t wait to see what customers think of the collection.”

British designer and retailer duo Jigsaw and Roksanda have released the final collection in their series of collaborations. The mood-boosting collection of effortless, elegant and unusual eveningwear and tailoring includes a perfectly polished sleeveless blazer and trouser look, an ankle-grazing silk skirt and top and some beautiful multi-coloured plissé pleated pieces.

Speaking of eveningwear, Malone Souliers and Tabitha Simmons have created a timeless collection of footwear that includes embellished sling-back heels, beautiful heeled mules and flat Mary Jane styles, all of which are perfect for the incoming summer event season.

The 10 summer fashion collaborations you should have on your radar