hi Mama of 2, thanks for your response. I actually did check his ears out with a couple of doctors on two separate occassions and they both found nothing. I am happy to report though that he has now slept the past 4 nights from 7.30/8.00pm to 7.00am - without waking once - ABSOLUTE HEAVEN!!!!! I hope it lasts but just have to expect that sometimes this just happens and no one knows why! I am trying to cut down his day time sleeps so he is more tired at bed time and this seems to be working.

And I can tell you after some good nights of sleeping through I have an angel on my hands - he has been such a pleasure! Amazing what a good night's sleep does - for everyone!
Thanks everyone for your advice and input!
xx