Actually the PAC Report confirms that the carrier build is going well! The issues raised revolve around the viability and cost of the F-35 programme and then the modifications needed and their costs to allow the ship(s) to carry the "cat and trap" version of Dave after the change of mind in last years SDSR.
MOD also enquired about the cost to enable UK F-35's to carry a Buddy type AAR store which only added more cost uncertainty as neither the US or any other Nation intends buying the F-35 with this capability.