(3 hours ago)Storx wrote Guessing it was a typo with the Seghill - Seaton Delaval - Backworth, impossible that unless you ran it along the back road by Fenwick Pit but that wouldn't be fun.
Btw if you want to create the links there for the 344, you'd be better just extending the 57/57A back to North Shields like it did for years (the 57A Sunday boards is pretty much the route bar it ran the 306 route from Billy Mill to North Shields).
I can't comment on most of North Tyneside but the main missing links in Seaton Valley which people moan about are, probably in priority:
Seaton Delaval / Seghill / New Hartley to Killingworth
New Hartley to Cramlington
Seaton Delaval / Seghill to NT Hospital
I believe Marsden / Tynemouth to NT Hospital is quite a big one though since every bus in the area duplicates the Metro pretty much.
The problem with your 19/20 idea is that i assume it will take about 90 mins end-to-end. Whereas my 344 takes 53 mins. If you wanted tynemouth serving just add a 345 aswell (That was in my draft idea though it ran via beach road & the broadway).