Was searching for Information on Staunton Harold resevoir and found this old post. I've got the ticket to fish this water but have heard little about the carp fishing on it. Apparently a lot of bream in but without fishing it I cannot be sure.
In terms of carp fishing it, a more difficult water I cannot imagine. Firstly it is massive (200+ acres at a guess), there is no night fishing allowed, only 20-30% of the bank is available to fish, no prebaiting allowed, very active boat club, and no history of carp being caught. Adds up to a tough water to crack and probably a few blanks!