Rules may be rules but you can never put the genie back in the bottle.
The Official Secret's Act of 1911 made great play of the offence of sketching military facilities etc. Mainly, I imagine, because a sketch was a more covert means of gathering intelligence than a photograph and did not need bulky equipment.
Furthermore naval officers had been instructed in the skills of sketching and drawing as the only viable way of securing intelligence.
Clearly new technologies can reduce the need for sketches etc hence the need to widen the scope of the Act. But the speed technology and the affordability of image capture devices far outstrips the ability of the plods to police it.
As thrashed out earlier on the DIN Photography ban, you can capture an image, transmit it, and delete the evidence such that it cannot be proved locally who did it.
When you find the camera, telephone, webcam, CCTV or whatever you still have to prove who captured the image.
"Not me Gov, I always leave my . . . in my desk."