Mandarin Oriental Hyde Park
This is 'one of the best-located hotels in London', according to Peter. 'It never rests on its laurels and is constantly evolving,' he adds. Recent events have included special 'sugar and spice and all things nice' afternoon teas, designed to reflect Jo Malone's vanilla and anise cologne. It also has a lovely spa.
Where 66 Knightsbridge, London, SW1X 7LA (020-7201 3773; www.mandarinoriental.com)
How much doubles from £329, B&B