DD1 who will be 11 in October has started complaining that her bedtime is earlier than all her friends. This is undeniably true and I have accepted that things need to change but her friends seem to stay up until what to me is unacceptably late at that age - she's getting texts from them at past 11 o'clock. I could do with a little guidance on what is regarded as reasonable at that age. I know all children are different and some need more sleep than others but I'm interested in whether there's a rough consensus.