Tickets from Wegottickets on http://www.wegottickets.com/Serenata
The Association of British Choral Directors is https://www.abcd.org.uk/
British Choirs on the Net – a useful site to explore –http://www.choirs.org.uk/
Other Choirs you may want to explore include:
https://www.kingslynnfestivalchorus.co.uk/
https://www.grantachorale.org.uk/
https://www.facebook.com/The-New-Thaxted-Singers-545275265984265/
https://hertfordshirechorus.org.uk/