There are some games it might work, but Fardy shifting to lock when our reserve tighthead is on the field against England sounds like a nightmare situation for us.
Doesn't that depend, who comes on as reserve lock?
The presumption of say Simmons and Carter starting, Skelton coming on for Carter and later Simmons going off, and then Fardy going to lock as Higgers or McCalman start a session is not the worst approach