Since the clocks changed (and potty training started), DS's sleep patterns have deteriorated from what was once a consistent sleep routine to chaos.
His bedtime routine is exactly the same, but when he goes to bed he just entertains himself until somewhere between 9pm and (latest ever the other night) 11pm.
Sometimes if I feel it's getting silly I can get him to sleep by rubbing his back, sometimes not.
In the daytime, he will still nap, but usually not until 2pm and only if we're out in the car, he doesn't settle in his room. This has been the case since he moved out of his cot last year.
If he has any kind of nap at all, whether I let him sleep (he can still sleep happily for 2-3 hours in the day, given the chance) or wake him up sooner, the evening remains the same. He is also VERY very grumpy when woken up.
If I cut the nap out, he is a nightmare by 3.30-4pm and if we have to get into the car for any reason, he falls asleep then. The other day, having had no nap in the day, he fell asleep on the sofa at 6pm, before finishing his dinner. Then he woke up at 7pm, cried so much I brought him downstairs to give him his milk, he finished his dinner, and then I took him back up. Not really a bedtime routine I'm hoping to continue with 
The upside of this is that last year it was the opposite way around - he settled as usual in the evening but woke up at 5.30am, so really I should be grateful! But really, he's still awake now and it's too late for a toddler.
It would be great if anyone has any advice - I've got no idea how to improve it now and feel like we just need to do something a bit more consistent if possible! Thanks for reading.