But AN has the same problem with a nanny...
I'm not going to take up the whole "APs don't exist any more" line I'm so fond of but we'll call the AP a Mother's Help for now and understand that it means a young, possibly foreign, person who is unqualified and maybe has a bit of experience, but definitely isn't a nanny.
The MH can work as many hours as she's contracted to. The question arises whether she WANTS to work this many hours and whether she'll be happy doing it. We're no longer bound by the 5 hours work/day guideline because the visa requirements changed but split shifts aren't that common and is AN happy having an AP do her schedule?
MH can be on holiday/sick leaving a childcare gap. In this case AN presumably does what she does with her CN and finds a temp, takes parental leave if she can or smiles really sweetly at CN if slightly ill and completely stuck and lightens the load as much as possible.
AN - a combinatation is possible but probably not, at this point, a really viable option. Once your DS is in school then you're sorted.
I agree without knowing what you pay it's difficult to know what you'll get but I expect a little extra for any starts before 8am. If you paid more I'd say you'd get what you wanted no problem
FWIW I usually start at 7.45am (I'm live out, accomodation they provide 2 streets over) and practically never finish before 7.45pm. Occasionally I need to start as early as 5.45 (if my boss has an early flight/train). I stay over at least 1 night/week and babysit another night. I COULD NOT do it if I had my charge at home all day, it would kill me. I find Wednesdays (no school days) incredibly tough. As it is I have 8.45-11.45 and 13.15-16.15 Mon, Tues, Thurs and Fri to myself....sometimes I use the mornings to sleep. Your schedule would completely knacker me I'm afraid! But then again my charge does have additional needs so I don't know what it would be like with 'normal' children.