Hi there, at this age the recommended safe position for sleep is on the back in a room with parents. If you choose to sleep your LO in another position then that has to be your individual decision after you have weighed up the risks and benefits for yourself, and I would think that LO should be observed at all times if you do so. Some options could be to shh pat when lying on his back (I just laid my hand across the nappy area and patted the opposite hip) or to wait until in deep sleep (around 20-25 mins into a nap) and try turning at that point.