He is near the bedroom so I do get up if I hear him, I wouldn't just leave him to sit in mess. But yes, he does seem to poo at odd times, sometimes after a meal and sometimes not for several hours after. His last food is at 4pm and then he usually goes at some point between then and bedtime at 10.30pm. He usually does then want to go in the night as well. He doesn't get snacks in the night.

I have changed his food from royal canin to burns in the last week so perhaps over another week or so it will sort itself out. He had quite soft poo on the royal canin and was going 2 or sometimes 3 times all at once. Now that side of it is much better at least - nice and firm.