(26 Dec 2022, 4:03 pm)peter wrote Don't trust Bustimes for registrations.

The X71 registration also includes the X72 - the route details on the registration are those of the X72 between Newcastle to Stanley.
The X30 was still down as going to Consett for quite some time on Bustimes - the registration still says Stanley.
With the X15, again it's a combined registration, and is still down as the X5/15 - Bustimes doesn't always update route numbers correctly 
Presuming you're just guessing when it comes to the 78

Given that the route changes to the 16, 47, V5 are mentioned in the description, this would also be the case if the X71 and X30 were changing.