Thanks for replying.
I put him down both for naps and at night time awake in his cot. He talks to himself for anything between 5 and 15 minutes and then drops off.
We start the day about 7.30am and have A sessions of about 90 to 120 minutes before sleeps of about 30 minutes. He rarely sleeps longer than 30 minutes. He currently has (just finshed BF) a bottle at 7.30am, food at 10.30am, bottle 12pm, bottle 2.30pm, food at 5pm, bottle 7pm, bed 7.30pm. I am going to introduce the third meal of the day next week at 7.30am, make the 10.30am feed a bottle and then the 12pm feed food. I hope this makes sense and answers your questions as I'm not really up on the jargon correctly!
I know that his A sessions look a little short for his age but anything longer and he becomes overtired (I think).
Thanks again for you help here.