According to all the written material available, Tony is right: The Shadows do own the rights to all the Polydor-issued material, via Rollover Records (and Hank owns his solo material via Handisc and perhaps "Hansic" as well).
So unless:
(a) Universal/Polydor's licensing period (from the previous CD re-release of the album) had not expired - which seems unlikely given that the CD was released twenty years ago - or
(b) the company has a long-term option on re-releases (whether on their own labels or via licensing),
it would seem that the control of the Rollover material is completely with The Shadows and their management.
I'm not sure what Didier means when he says that The Shadows gained a say over their back-catalogue after leaving EMI. They didn't gain any such control over recordings in the EMI vaults, though it seems to have been EMI's voluntary policy to consult on the release of unissued material.
HTH,
JN


