When a Margaret Howell sample sale is announced you can guarantee that queues will start early in the morning and elbows will be sharp and ready for action.

What is it about Howell that engenders such a cacophony of glee from fashion editors and laymen alike? The answer lies somewhere between the intricately cut British fabrics she uses and the timeless elegance of the finished clothes: Howell is a master of her craft and fulfils the expectations of her loyal customers season on season.

Look out for the designer's key looks; effortless oversized blouses and classic tailored trousers. With an androgynous aesthetic ahead of its time, Howell is queen of the perfect white shirt. With blue and white shirting being celebrated in all its forms this spring, a crisp piece of white cotton should be top of your shopping list.