https://www.petworthfestival.org.uk/events/petworth-proms-friday-18-oct/

"Join us for three magical musical evenings in the state rooms of Petworth House, in partnership with Petworth Festival. This harmonious promenade will feature a sequence of mini-concerts in the Carved Room, North Gallery, Chapel and Grand Staircase.

...audiences will be invited to join one of four groups which will then proceed at 7.25pm to the first of a series of simultaneous concerts, each of which lasts 20 minutes. Following the first concert, you will promenade to the second venue for the next performance followed by a 20 minute interval and the third and fourth mini concerts. The event will finish at approximately 9.30pm."

FRI 18 OCT, 19:30

PETWORTH HOUSE (VIA CHURCH LODGE ENTRANCE GU28 OAD)