Don't think this Mirror story can be based in fact.
I don't see why Jones would chose to join United where he would immediately be behind Vidic and a fit Rio in the pecking order and in competition with Smalling to be the first back up player - Evans still at the club to, though he needs to get his game going again.
Long term I think Smalling and Jones will be the England CBs, and I think they could be a great partnership for United too if they were paired together, but I just don't see how a move to United now would make sense for Jones, when he could likely get a move to Liverpool or Arsenal and first choice football too.