Thanks girls,
yes heavy distraction (talking/singing/tv(!)) seems to work for 2 minutes or so. But even better than that, today at baby massage class (he has a towel under him) when it was tummy time, he started chewing the towel like mad and stayed on his tummy for five minutes, amazing. Also, when on his back he seems ok if he is sucking/biting his hand. He always need something in his mouth, but is not overly keen on the dummy!!! I thnk he wants to bite rather then suck.
Yes I have noticed that he cries when I leave the room- is this normal @this age? DS1 didnt notice this till he was about 5 months.
xx