Invincible IS being cut up. Already up for sale for recycling, and that's all she's fit for after being stripped. Ark Royal is another matter, but you said Vince.
Harriers MAY be saleable, so why cut them up?
An interesting thought just came into my head while writing this.
If the already-converted MRA4 frames are cut up, but the yet-to-be-converted MR2s are held off for a while, does this not SCREAM that political embarrassment is the only reason to destroy these frames?