I can't remember exactly how old Angus was when he dropped his morning sleep I think he was around 14mths.
He was always happy to go to sleep previously, but would cry when I put him in his cot and if I left him he would go to sleep but only for about 20 mins.

So I tried putting him down for his afternoon sleep at 12:30 soon after lunch and he still is in this habit. He has a good 2 1/2 hours.