Hi Terence,
I recently fitted an extraction fan bought from Screwfix, Vent Axia (28935-90) Luminair with Overrun Timer. It has been in since June of this year and so far has been excellent, however we still have the winter to come.
The light on the fan is ideal above the shower tray but you will require more lighting for the bathroom area, the noise level is acceptable and the overrun time can be adjusted to suit yourself.
I can only give you my opinion of an Item that cost me over a �100, I am more than pleased with it and in the new year I am having to instal another one in a second shower room.
Regards
CSG2306