South Baddesley is a small place: a church, a school and a few cottages. We parked in the church car park, a couple of hundred yards North off the Lymington-East End road.
I walked back down the lane to the junction, but could see no sign of a sarsen, even though the GPS said I was on the spot. There’s a small triangle of grass at a junction with a side lane, that would have been an ideal spot if the stone had been moved, but it was bare.
Sadly it looks as if this is no more (or is now recumbent in a ditch, covered by undergrowth)
You were so close! The stone is at the side of Brook Hill, where the triangle of grass forms the junction with lanes to Portmore and to due south, on the same side of the lane as the church of St Mary The Virgin.