It has today been revealed that a decision on Ross' future will take place next week.
It is understood that the Blades paid the majority of the playmakers wages during his stay here, and that could be a stumbling block for any potential move back.
Rotherham are rumoured to be another interested party, with the Millers and United doing business several times in the past, but Ross has previously stated his determination to see out the season here, provided he isn't in Warnock's plans.
With the news that the Premiership outfit have today signed another midfielder, Egyptian International Ahmed Fahti, Ross has surely slipped even further from Warnock's plans.
We will now know either way early next week.
Notts' two other loan signings, Jay Smith and Daryl McMahon, see their deals expire following Saturday's match with Torquay United.
Smith, with ten appearances to his name, has been the most impressive of the duo, and Thompson claimed he had been Notts' form player during the disappointing Christmas run. Therefore he is determined to keep Smith, and will talk to his club, Southend in the near future.
McMahon's future is less decided. Following illness and poor form, the Leyton Orient midfielder hasn't featured too heavily, and may want to get first team football elsewhere. Notts though need the bodies, and have little money to increase it outside of those they already have.