Choral Evensong at Southwark Cathedral this Wednesday 10 July will be broadcast live on BBC Radio 3.
The cathedral will be closed over lunchtime from 12.45pm to 2.30pm for rehearsals.
Those wishing to be present for the broadcast at 3.30pm should be seated by 3.10pm.
The broadcast marks the retirement of Peter Wright who has been Director of Music since 1989.