Thanks for your suggestions. I tried looking at his sleep times during the day and even reduced them a bit but that was disasterous. Funnily enough by that point I had enough so I just let him do whatever he wanted for a couple of days and surprise surprise, I think he was just trying to develop a new 'routine' from his previous. The clue for me was when he started refusing feeds as he has always been very hungry and woke for a feed like clockwork every three hours during the day. Since I just loosened up a bit I've had hardly any trouble settling him for his day sleeps and the evenings have been much easier where he is settled into a night-time pattern from around 7 (although still feeding at around 10). Last night he slept from 11.30pm through to 7am - yay! I'm still clueless as to whether or not this is a temporary respite, if he was just going through one of his wonder weeks phases, or if this is the light at the end of the tunnel. I agree, what an experiement! Glad to know we aren't alone though.