Our two are similar to Graeme’s no matter what time they go down they wake between 6.30 and 7. We have recently been playing around with the eldest 4’s bedtime moving it a little later than the 1yo’s at 6 but he just seems to need the extra hour. Things always change with kids and hoping they get teenager syndrome soon and just want to have a lie in.
We tried the sleep sheriff system a couple of months ago for the youngest but the his sleep patterns and nap pattern (about 10-12) didn’t work with it and he is a big daddies boy