From "Treago and Mynors Family", 2nd edtion 1998, by H. Mynors, private publication:
Gilbert was succeeded at Foxcote and at Eycot by ROGER DE MINERS (RBW). This is the Roger to whom Henry II (1154-89) granted the manor and advowson of Westbury on Severn for the service of a hawk or xxs, yearly (PQW 1287/8) because early in the thirteenth century his grandson Henry was seised both of Foxcote and of Westbury on Severn.
It seems likely that Roger's tenure was not very long, for he does not occur again.