I'm not sure if 7624 will be there for Metro replacements or not, it might just have been transport for drivers there for route learning today.
Similar 7601 (and hybrid 7805) were both at Jesmond for attention on Sunday when I was there for route learning.

Liking the training livery on 1206, looking very fresh! Hopefully 1210/1/2 will look as good after attention at Thorntons!