Ours was Catholic, but they also liked money, like a lot - so it was full to the brim with Indians and South Asians. Let's just say the Vicar had no idea what to do, and the kids parents were clearly pushy enough for him not to be able to ask them sing any songs like "god has a white beard and a six pack" or "we are the chosen people" or anything blatantly western.
We did sing some nice neutralish songs that stay with me today:
When a knight won his spurs in the battles of old
He was gentle and brave he was gallant and bold
With a shield on his arm and a lance in his hand
For God and for Valour he rode through the land
they still do at high school games in Germany. Admittedly it's usually the song of the town, or the song of the state (or state before it was merged, just to mess with the other states), and some of the songs sound very much, uh, march-in-formation-y.