Just a quick update about how my boy's sleeping is going. Interestingly, pretty much everyones responses advised not to leave baby to cry. I ended up modifying my approach so that I still let him cry, but instead of leaving him I stayed by the cot and patted him while he cried until he stopped, then left the room. He now only cries for 10-15 seconds when I place him in his bed, then he shuts his eyes ready for sleep and sleeps until woken for a feed at 10pm, then sleeps until 5am. Pretty successful, I would say.

Thankyou for all your replies but I believe I would still have him not going to sleep properly had I kept picking him up and rocking him/wearing him/soothing him in my arms ect. He has learnt to put himself to sleep and can also do this during the night without me having to go to him. Bliss.