This is approximately a five acre enclosure, fairly triangular with a steep drop on the other two sides, Bank is still impressive, it maybe that this site belongs to the same time as Old Sodbury Camp, (250bc-50bc according to James Dyer) There is a longbarrow above the church at Hawkesbury, which is about a mile down the road.
Longbarrow ref; ST768 871. It sits high on the hilltop, somewhat reminiscent of Adams Grave.
There is also another longbarrow marked at ST777828, Grickstone Farm but this has only one stone remaining, see Rhiannon’s information.