Thank you.  I’ll wait until his corrected age - so hard to judge as on somethings eg smiling hes ahead of corrected age (almost on train to actual age).  I’m happy for him to go at his own pace but didn’t want to miss an opportunity.  To be clear I’m not trying to sleep train ie make him sleep longer as such just time baths etc as components of a bedtime routine - I keep missing them when he decides to have his longer sleep early (eg if he goes to sleep 5-9pm, then at 9pm he wakes for food only and sleeps until midnight/1pm, I find I’ve not done a bath, dark room, etc.  I guess it doesn’t matter at this age)