The very same clergy who don't seem to mind preaching long sermons in inappropriate services (Carol Services/Choral Evensong etc) have also developed the similarly tedious habit of inviting the assembled multitudes (!) to stand to sing hymns.
The organist starts, the choir stands immediately and the congregation heave themselves up before the start of the first line - mostly. What could be simpler.
The clergy-led alternative leads to chaos and confusion among choir and congregation alike - or maybe it doesn't matter to anyone else but me. I have heard the congregation invited to stand, hymn number announced, first line read, number announced again, congregation invited to stand and number again - all for one hymn. We'd soon hear about it if the anthem was a bit prolonged.