St James's Room
This elegant corner of Fortnum and Mason's is a mecca for tea lovers, according to Tonia. 'It offers lots of stunning teas but a good afternoon tea, which can be drunk with milk, is their royal blend, originally conjured up for Edward VII. Its vast range of teas includes Tregothnan black tea, developed on a Cornish estate over the last decade and dubbed the 'next Darjeeling'.
Where Fornum & Mason, 181 Piccadilly, London W1 (020-7734 8040; www.fortnumandmason.com)