Anywhere on sand or mudd, back of Tynemouth pier, around Marsden etc...doubt you see anything over the 4lb mark with most being 1/2lb upto 1lb.
Its not a type of fishing that interests people.
Try 1/2 mile off Tynemouth pier online with the car park on the cliff or clock tower, or if your further north try the hot water outlet pipe at Newbiggian, if south around souter just look for a clean bottom.