https://www.arrivabus.co.uk/latest-news/...-newcastle
Arriva have posted a notice that all Arriva buses that serve near Barris Bridge will be diversion on evening throughout the night. I have posted a link.
One of them shows that service 51 51A 52 306 and 308 will divert via John Dobson Street and Blackett Street and Percy Street during this time
Arriva Service In Newcastle Diversion