I suspect it was taken apart for cleaning then lost
Or "bored", just fiddling about ... or some "other" reason.

Careless, at best; so what about accountability? How will "lessons" ever be "learned" unless someone gets hit (in the pocket)?
And "grey goods"? Don't "NHS service providers" (whoever
they are) follow the same equipment procurement and acceptance procedures as the "proper" NHS, then?
