What are the L.Ps of the GCHQ case?
L.P: held that some types of prerogative powers can be suspetible to JR
L.P: states that even if a legitimate expectation has been breached, if the breach was done because of fears of a possible threat to national security, then the breach will be lawful
L.P: national security is a concept not reviewed by the courts as it should be reviewed by the Executive