St John's Boxmoor, HP1 1JY. 7pm. £12 & £3 (under 18), proceeds to Age UK Dacorum. With Aeolian Singers - conductor Stephen Jones; Dacorum Community Choir - conductor Rufus Frowde, accompanist Judi Kelly; Sandringham School Choir - conductor Amy Stothard; St Albans School Instrumental Ensemble, led by Anna Le Hair.