The park have managed over half the season without the Skyride they're not going to do anything about it nowI think it might be worth asking D&G buses (the employee bus operators) if they could run some shuttle services between Towers Street (preferably through a building into an employee car park to avoid the turnstiles), Forbidden Valley and David Walliams using the exterior roads as a stop-gap.
I know it's a terrible solution but it's better than nothing.