The Uley complex as it might have appeared in the second and third centuries AD. The reconstruction image includes the temple, other excavated buildings and possible additional buildings on the edge of the settlement. (Woodward and Leach 1993 fig. 212. Illustration by Joanna Richards. Copyright JFR 1993)
For the details regarding the Uley stone church of the 6th century, I would refer my readers to:
Here I merely wish to make my case for this stone church at the site of an ancient nemeton being the burial place of Arthur.
I base my argument on the church's proximity to the great Uley hillfort. I believe this site to be Arthur's Camlan, from *Cambolanda, 'Crooked Enclosure' or, perhaps, 'Enclosure of the Cam/Crooked Stream.'
Unfortunately, we do not know the name of the Uley temple. Nor do we know the name of the British god worshipped there in the pre-Christian period. Professor Roger Tomlin may possess material that would at least allow us to guess at the name of this god, but he is not releasing that information until he finishes publishing texts and translations of the lead curse tablets found in the temple grounds.
The presence of a possible 'Avalon' (the Lydney temple, if properly rendered as *Nemetabala, 'Sacred Apple Grove') across the Severn from the River Cam is intriguing, but any association of this place with Arthur would be mythological only. There is no evidence for continuation of worship, pagan or Christian, at Lydney after the Roman period. And, besides, as I've shown in my piece on Geoffrey of Monmouth's Avalon (see http://mistshadows.blogspot.com/2018/03/the-avalon-of-geoffrey-of-monmouth.html), Arthur's being ferried to such an Otherworld location seems to be due solely to a misidentification of Camlan with the River Camel in Cornwall, which as it happens has an 'apple' place-name nearby.