Charlie was in a hammock until just recently, which kept him on his back, but he has recently transferred into the cot sucessfully, and from the very first sleep in the cot he rolled onto his tummy and sleeps like that all the time now.

Like most people, it freaks me out a bit from a SIDS perspective, but I reckon once they have the swing of rolling over, they do it instinctively in their sleep both ways too......

BTW, Charlie has just also started sleeping in a sleeping bag at night and it definately doesn't hinder his rolling round at all.........

HTH