Actually Hand Solo if you have been up all night looking after a kid then I feel that you aren't fully rested and that you shouldn't report for a long multi-sector day. It's called being a professional.
I'm in no way having a go at commuters, an hours flight as a pax is probably a lot more relaxing than driving round the M25. But positioning for 6 or 7 hrs and then operating is just not on. Neither is doing a three hour plus car drive. That is taking the mickey out of the system. The pax have a right to expect the pilots to be fully rested. I hadn't realised that there are proscribed limits. It's time the CAA and BA started to enforce them. This job aint a joke, the mistakes we make are for keeps. Tiredness is a killer. You wouldn't turn uip for work drunk why should you turn up not able to safely operate for the legal day plus discretion.