I'm assuming this is almost certainly a "no", but does anyone know if you can combine a Gold Priorty Reward with a Barclays Upgrade Voucher?

The T&C's on BA's website exclude using GPR with a bunch of things "7. Gold priority reward may not be used in conjunction with [i] Avios & Money, [ii] Gold upgrade for one or Gold upgrade for two; or [iii] Avios for upgrade or [iv] American Express Vouchers."

But Barclays vouchers are not on that list... so in theory the combination is not excluded.