Yep, no chance you want someone drilling into it by accident which is very possible. Even if it's just a metal plate running over the top of it before the board goes up
Yeh i think we're going to box it in at the moment, not much more work.If you cover with one of those plates I linked, they’d be hard pushed to drill through it, without coming to the conclusion it isn’t brick etc they are drilling into.
Does make me wonder about other gas pipes in myhouse... for example to my cooker hob. There's no visible pipe outside so the gas pipe for that must be routed in the walls somewhere...which seems 'OK'... which i guess is the same thing i have in my garage... in that i want to hide them in the wall.