I read last year that Ryanair will begin to charge people for using the toilet aboard all flights in order to cut costs. However, they have subsequently decided to scrap this plan and reduce the toilets to one per plane - for 201 flyers. The purpose of this is to add 6 more seats with in place of the removed toilets.
The airline’s chief executive, Michael O’Leary, told The Independent “It would fundamentally lower air fares by about five per cent for all passengers” – cutting £2 from a typical £40 ticket
My advice for the meantime, explore other cheap alternatives before you find yourself on the wrong side of a locked door and an insatiable need to evacuate your street-stall curry laksa.