DS is a great little chap and really chilled. Maybe a bit too chilled! He still hasn't rolled over, not even once . I'm not worried about about his development, he seems fine, but I think it's be nice for him if he was a bit more mobile.
He rolls onto his side a lot and mysteriously slowly turns in circles when he's on his mat on the floor. He's getting the hang of sitting unsupported, he can manage a minute or so. He wont lay on his tummy for very long, he can, but he hates it IYSWIM. The (equivalent of) the HV isn't worried about his development BTW.
DD was late-ish rolling, I'm not sure how old she was (maybe 5 or 6 months?) but she was certainly proficient at rolling front to back and back to front at this age...
So, is there anything I can do to encourage him to roll?