I'm obviously not going to do a flounce on the basis of this, but..
We used to have hymn numbers in the service sheet (there's no boards). But they've stopped doing that, in the aim of inclusion. Instead, the hymn numbers are announced during the service.
Which is ok, except when we stand to offer one another a sign of peace.
So the clergy say 'you may now offer each other a sign of peace, and the next hymn is xx'
Written down, it doesn't sound that bad, but it actually feels like an interruption in a lovely part of the service.