You might be interested in Twickenham Choral Society's next concert, on 31 March, at Kingston Parish Church. Conducted by Christopher Herrick, with Iain Farrington at the organ, repertoire includes Naji Hakim's "Gloria", and Hakim will be present as a special guest. https://www.facebook.com/events/203469339706186/
Iain will also be playing the Finale from Vierne's 1st Organ Symphony, and Alain's Litanies. Works for choir and organ include Pärt's Beatitudes and Langlais' Messe Solonelle
I'll try to be there! Much as I dislike the KPC organ, that's too good to miss... but miss it I did. I forgot it completely, having been in London the previous day.