One of the most stunning venues in the city, this rooftop wonder has massive sculpted gardens with views across London, and an outside bar under grapevines. The food does not disappoint either, with classics like steak tartare and escargots, lamb rump with carrot and cumin or thyme-roasted turbot. Set menus from £25. brasserie: £££; restaurant. ££££. Mon-Fri B, L & D.