Why not Change the 340 and 341 completely ....

Wallsend Bus Station (must to provide Metro links)
up Station and then onto Wiltshire Drive do a fancy bumpy loop

then....

340 turns Left pop up the Range turn right past asda to the roundabout turn left then right into the industrial estate and stop (create a bus stop in the industrial estate) it creates links for a (2 min walk to Palmersville metro) through the ind estate then turn left and head to Holystone A19 roundabout head to Northumberland Metro bus station (create a link for Ashington etc) then head to Cobalt round Hadrian park through Battlehill high Farm back to powder Monkey round wiltshire drive back to wallsend... the 341 ... does the opposite loop after wiltshire drive

it creates the potential to remove the 351