A UK shooter asked if I could find him a non-firing, replica flintlock pistol that he could use as a wall hanger.

One piece I came across was advertised as being non-firing: but the only difference between it and the firing version is that the vent hole is not drilled.
If you were to drill it out, it would be a FAC firearm.

So my question is: how would UK law define this particular piece? Is it treated like a dectivated firearm or a non-firing replica? Or is it a controlled firearm?

Jim