At the risk of sounding like an old fart, I agree with the head teacher 100%!
It's laziness, pure and simple! In an emergency, I can understand parents dragging trousers and a top on over pyjamas, but to do it regularly is disgusting!
It's certain that these layabouts don't have a shower and put their nightwear back on, so they're stinking too!
The poor children of such slovenly, slatternly parents are being brought up to believe that gutter standards are acceptable, so what can we expect from them in the future?
Maybe if these idle twonks got their backs off their mattresses earlier, got clean and dressed, and had some pride in themselves, they'd want to work, thereby encouraging their children to have some pride in themselves!
My grandparents both worked full time and raised four children, not many mums worked in 1931, but the work ethic is very important in our family. My parents both worked full time, DH and I always worked full time, and never once were any of us taken to school by nightwear clad parents, nor were we ever late for school!
The school in question is in an area with a lot of social housing and high unemployment, but that's no excuse for such disgustingly dirty and ignorant behaviour! Soap and water doesn't cost much!