Googling Dinedor Hill (the serpent runs at it base) thinking it might be a sacred hill,came up with the link below - an action group to save the Rotherwas serpent. So don't give up hope yet.......
http://www.rotherwas-cul-de-sac.org.uk/
p.s. it looks a very promising hill Rhiannon bit like Kelston Hill ;)
pps; Google Dinedor Camp and a whole raft of interesting stuff comes up under this road building!