Nah, those were designed for cavalry units.
Horses will dump you off if you play a bad enough note, so the bells were designed to play away from their ears.
"Tenor horn" is a different size in different countries. In Germany it is a 9 foot Bb instrument equivalent to euphonium but of smaller and more conical bore, similar to the British baritone. But I think in the UK tenor horn means what I would call an alto horn.
So which one do you mean?