Can anyone remember the 139/140 circular routes in Sunderland?

Remember when it was a joint operation with Sunderland busways and go ahead northern then Tyne and Wear ominibus and go Wear buses then redby under licence from Stagecoach and go north east. 

We had some bizarre workings on this route? 

However it was a handy route. 

What year did go north east completely take over the routes? 

I’m sure Sunderland busways did a scholars 139? 

Anyone have any memories of this route or photos of the buses used?