Thanks girls!
He is able to roll both ways and he sleeps with his head to the side so his face isn't obstructed. Of a day I probably don't mind soo much because I can keep an eye on him.

Shell - I have one of the sleep positioners but he doesn't like it that much because he can't move

Traveller - doesn't sleep with any toys etc... his sheet is tucked in so he can't really get tangled up in it... although he can get out of his wrap sometimes and I will go into him of a morning all tangled up

The other thing I have noticed is that if he doesn't sleep on his tummy, he likes to pull a blanket/sheet up over his cheek???