No......What ?

Well the title is slightly misleading as I have a fair idea of what the NO stands for but does anyone care to offer any suggestions ? Answers on a postcard......

My parents head back home to Glasgow this evening, its been a quick 3 & a half weeks...... I'm sure they have had a good time but its been pretty hectic, they may need a holiday to recover !!! By the time they read this they will be home, I hope the flight was ok !!!