Van Gaal is coming under increasing pressure after United’s 2-1 defeat to Norwich on Saturday.
The defeat means the Red Devils are without a win in six matches and they’re currently nine points behind league leaders Leicester City.
Mourinho was dismissed as Chelsea boss last week and his availability has increased the pressure on Van Gaal’s position.
And Collymore believes there’s now been a shift in the thinking of the Glazer family, who he believes will sack the Dutchman.
