Escorts in Windsor, SL4, as the Society arranges them after dark

St George's Chapel, in the Lower Ward of the castle, is a working chapel as well as a monument, and its choir sings Evensong there through the week. Of everything Windsor offers, it asks the least of a visitor: those who come for the service rather than the tour are let in to worship, and the singing under that high stone roof is reason enough to have made the journey.

A companion who is to share it must know when to say nothing, and Cressida chooses with that in mind. Karolina, who plays the piano and knows her opera, is an obvious choice; she will have a view on the anthem and keep it until you are outside. The castle's daytime treasures, Queen Mary's Dolls' House and the paintings hung through the State Apartments, supply the first hour of conversation at dinner.

The Theatre Royal stands on Thames Street beneath the castle wall and is the town's evening institution, with a year-round programme of plays and pantomime at Christmas. The house is smaller and less formal than a first night in Covent Garden, and your companion will dress for that room rather than for the Opera House. Luna, whose taste runs to new plays, is good company for an old one too.

A performance with supper after the curtain fits three hours, £1,500; add drinks before it and the evening becomes the Society's four hour dinner, £1,800. For a guest staying over, three hotels keep their doors on the High Street, at SL4 1LJ, SL4 1LH and SL4 1PQ.

SL4 is far outside Zone 2, so the tariff stays as it is and only the journey is added: Cressida prices a taxi each way, adds it to the fee and sends the whole as a single written sum on WhatsApp, for your agreement before anything is fixed. Allow more than the Society's usual hour for W1, and more again when the M4 carries the evening traffic; Cressida sends the precise time once the car has set off. Write by teatime for a curtain that evening. The fee is hers, given by your own hand when she walks in.