Keane remains one of the front runners to land the Celtic job, though he faces stiff competition from Eddie Howe and John Kennedy, and is believed to have held talks with Parkhead chiefs.
Steven Gerrard brought in Ryan Kent from Liverpool on loan when he took over at Rangers, and Keane could do the same with his Man Utd contacts.
Former Red Devils team-mate and recent head of development at the club Butt is being tipped to become his assistant, and the pair could use their influence to land some of United’s most exciting youngsters.
JUST IN: Man Utd trying to poach Man City transfer specialist
Williams’ career has stagnated this season, and he needs some regular football to kick start it back into life.
With Luke Shaw and Alex Telles holding down the fort at left-back, Williams is in a good position for a loan move away from the club.
The 20-year-old still has a bright future at United, but some time away from Old Trafford could do him some good.
Shoretire was recently handed his senior debut, and there is a real buzz around this 17-year-old.
A loan move would guarantee him regular football, which he quite simply won’t get if United hold on to him.
But as shown by Marcus Rashford and Mason Greenwood, sending players out on temporary deals isn’t really their style when they are on the cusp of the first team.