Bathroom ceiling

I'm looking to completely refurbish my bathroom. I've currently got polystyrene tiles on the ceiling. We've decided to move out of the 1970s and into the 21st century and install uPVC panels. We don't have an extractor fan.

Has anyone else installed these panels without an extractor fan? If so, is condensation on the panels a problem?

Would it be advisable to install an extractor fan as well?

Or can anyone recommend a more "cost effective" alternative?