Cheers for the help just saw the photo and didn't recognise the service at all but if it was just a trial probably why I don't remember it!!

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Actually thinking of trial routes there used to be one from Hadrian park to north shields I remember can't remember number but it only ran a couple of times a day I think, used to be ran by a yellow Olympian as well when it ran, didn't last long like, just trying to think if it was done before or after the introduction of the 315/316 (and I'm not confusing this with the 391)