Thanks for the replies.
He isn't sleeping for the whole nap time - they seem long as I am including the time it takes to get him to sleep in that, so most naps are probably 45 mins but I will try and get him to take one longer nap per day. I am guessing that I will extend the A time as time goes on and spend less time settling him for naps (we have to be optimistic, right?!) Until recently he was waking at 7am and then I would put him down for first nap at around 8.45 or 9am, following his cues. Later in the day though he seems to do his first yawn around an hour or hour 15 mins after waking, so i do try and take him for his nap as quickly as possible after that.
So I think myplan is, when he is recovered from the cold, start to get him up at 7am, follow the 3 hour routine from there and eventually it should click into place and he'll go down at around 7pm rather than 10.30pm or whatever he is doing now?
Thanks for the encouragement -thissite is really awesome!
Vicky