How long do you have between dinner/tea and bedtime for your little ones?

If you are not home till 5:30 - 6:00 ish do you push back bedtime to give time for food to settle?

DS seems to sleep better the longer there is between tea time and bedtime - but I start work tomorrow so for those days is going to be pretty much impossible to be finished eating before 6:30 - do I push bedtime back from 7:00 - to allow more digestion time?

Another question - if your children are in childcare do you still give them a proper meal for tea even if have had one for lunch. As long as work has some heating up facilities DH and I will both be having our main meal at lunchtime because that is our preference - we then have more of a snack - e.g. salad, soup,sandwiches, simple pasta in the evening. I am never really sure whether on a daycare day I should be doing something more substantial for the children - in their daycare books it says things like 3 portions vegetable pasta, or 3 portions tuna mornay etc - and will have had afternoon tea as well.