The site we are talking about is located on Gray Hill. The "Gray Hill" site on TMA mainly refer's to the stone circle and standing stone.
As my posting suggest's the site I talk about may not be of any consequence and does not require a dedicated site on TMA. It's for discussion and if gains any importance or merit it could be added as a Gray Hill site.
Still can't work the Chepstow bit out :-)
Ike