Why not do airport security, as we do seaport security?

Future Labour Leader Michael Wood has been decrying the possibility that airport security may be devolved from CAA to individual airports. He says this is terrible.

However a reader has pointed out to me that seaport security is done by the 21 ports, not by the Government. The Government has an overall regulatory role, but doesn’t actually run the security checks at each port.

No reason this model is unsuitable for airports.