Stored Harriers are not a ready combat force

Could the Royal Navy reactivate its Harriers for close support?

Not as an existing operational force; stored aircraft may retain some utility, but reactivation would require far more than having airframes available.

The Royal Navy retained Harriers at Culdrose for deck-handling work. Those airframes preserved some equipment and practical knowledge. They did not amount to a combat force that could return on demand. Reactivation would also require available aircraft, trained personnel, maintenance support, and operational integration.