I been hearing that's 7424/25/26 are getting replace this year is this true

Depending on numbers, could some of the 14 reg Sapphires (original X21/X22) not be used from Ashington if the new MMCs arrive in good time?

One of the X93 branded B7s was being towed along the Felling bypass about an hour ago. Anyone know where its off to?
Looking on bus times it must have been 7424