I for some reason read the 18:30 start time as 16:30. With the latter, I would have been at home at 8:30 am to listen. With the latter, I had my rear parked on a pew at St. Mark's (at 10:30 am).
He must have thought I was quite daft as I had said something about being off the rota at St. Mark's, so would be listening to it. (He knows our service schedule.)
Unfortunately the Beeb doesn't seem to have that one on replay. But as it happens we got it as the communion motet, so I did get to hear it. (Guerrero, for you music buffs.)