I've never been completely sure so use Beckhampton Longstones longbarrow.
South Street barrow was closer to the longstones at Beckhampton cove.
It looks great at the moment. The right side looks like it has a horned forecourt which wasn't very visible before. This Maybe due to past excavation as it has been knocked around alot.
I have photos of a year in the life of the barrow from the same spot which is almost complete.
PeteG