In fairness, I believe the medical facilities at shirecliffe are more than capable of holding a player medical.
Physical test, running machine, few cones, heart screening, physical exam with doctor??
What more is there to it? It's not like its an MRI scan requiring a £6m piece of equipment.
I have no clue if this is right or not, however I certainly wouldn't be ruling it out based on someone saying they thought someone was having a medical. Could just as easily have been getting a tour if the facilities so they know where they are going etc for when they start.
I'm sure there will be some folk on here who know, but refuse to mention it or say anything as they will get hammered for it.