I received an email back of nexus today as I asked about the 19A not being a thing. The response was that a few people wanted the change yet it seems to be most people still want it as the 19

However at the bottom of the email. This sentence made me laugh

"some argued that the trips to/from Cramlington should be the 19, whilst others argued that the trips to/from Killingworth should be the 19)."