Thanks for your fast reply Nige.
The piping is corrugated and the water has gathered between the joists, partly because of this.
When I tried to move the water to the end of the house last night, I was unaware that the piping was in sections - consequently I ended up with water pouring out...
Not being a DIY person, I would welcome your views re. shower ducting.
Two months ago we had a new bathroom fitted and for the first time, an extractor fan.
Due to an RSJ being next to the bathroom, the plumber opted to run the ducting through the loft and out at the gable end of our bungalow...