The chalet bungalow upstairs bathroom.

Are there likely to be any issues with arranging a short 45 deg. fall in
the toilet waste pipe?

The current plan is a vertical outfall terminated at a manifold above
the soffit. There is insufficient space to get this high enough to
accept a full *horizontal* run. Probably 2m level, 45 deg. bend, 800mm
and another 45 deg. to the manifold.

I will arrange a vented (AAV) stack inboard to be higher than the basin
overflow.
--
Tim Lamb