Once frequented by the late, great Alexander McQueen (his design studio was around the corner), this best of London’s bistros was established in 2008 by Dublin-born sisters Joanna and Aoife Ledwidge (hence the ‘J’ and the ‘A’). Located in the cobbled backstreets of Clerkenwell, the cafe is popular with all sorts of fashionable types, not least since one of the sisters used to work for the designer Gareth Pugh, another regular. Not that this is reflected in meagre portions or miserly scrimping on the cream and butter (see the decidedly un-size-zero breakfast ‘pancake mountain’, served with either syrup, berries and cream, or scrambled eggs and crispy bacon). The fare is unpretentiously chic (for example, roast smoked trout salad, or couscous with roasted veg and goat’s cheese), well-sourced (with the likes of Inverawe smoked salmon, Fentiman’s old-fashioned softies, and Mighty Leaf ‘s herbal teas), and reflective of the owners’ Irish roots, with delights such as freshly baked soda bread and chocolate Guinness cake. With things getting boozy (champagne or Pimms) in time for afternoon tea, it’s the authentic Irish craic.