I’ve really found this thread incredibly useful.
All the shared comments have helped us decide upon a single room MVHR for the bathroom.
As mentioned here, drying clothes in winter takes a long time to dry.
We know it’s best to dry clothes in rooms created for wetter conditions - so the bathroom is our best choice.
Re heat - we can’t afford to waste it - so recovering it makes sense and scores another point to the single room MVHR.
Finally, wanting energy efficiency - it’s clear the MVHR is even more energy efficient than the dehumidifier.