I am not sure if this is any help, but often with Charlie and more recently Lexie, I would hold them out till an early lunch at 11.30, and then if they were really cranky in the afternoon, pop out in the car at around 3.30pm (for the odd chores such as milk from the servo, posting a letter etc......) and they would catch a short (20 mins?) nap that would tide them over till bath time...........