This is a load of ......... rubbish.  The B737-800 is certificated for 189 seats.  That's it.  Full stop.  No budging.  There is no requirement for any private or commercial aeroplane to have toilets; therefore wonder what happens when a team of burly rugby guys fly from UK to Eire for a weekend away......a few (phew?) jars prior boarding.... bladders full en route..... a pound?  A POUND? Are you joking?  Clear this up!  

And of course the fear of a full bladder prevents anyone buying a drink on board so coffee sales on board eire o'flot will fall.  

Well done O'Leary; hitting the family with kids again.