Again, at Lordenshaws, signal was present for all networks, though it was a little patchy here and there. But as an overall conclusion, there is indeed scope for utilising mobile phone technology and, crucially, we should be able to make use of some signal on site. Hooray!
For sure reception everywhere is improving, and places you couldn’t get a signal from previously you now can. Heritage Action has started working on how QR technology might be used to further promote a wider understanding of our megalithic heritage, could you see that working at (some if not all) rock art sites?
Your proposing we should have little plastic stickers next to rock art. ?
Personally if i saw any in my neck of the woods i'd remove em, there's enough tat at ancient sites without encouraging more.