We celebrate Stephen Sondheim's 85th year with a lunch time crammed full of him absolute  best songs and ensembles, at the Cadogan Hall. Kitty will be joined by pianist Richard Sisson, and broadway stars Jamie Parker and Sian Phillips. Day seats are available at the box office from 10am, and if you can't make it, tune it to BBC radio 3, where it will be broadcast live.

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