Hi Andy and Rob,
The only time i tried to fish Tynemouth , it was not possible to get on, for the club members.
Along from there , which i presume you have fished, is Blyth Pier, said to be the best Cod spot in England. Most people try and fish from the end, which is very dangerous anyway,- but if you fish sea side from the bend in the South Pier, you are fishing into a trough, which always gives up some good fish.
Also from Blyth beach, about 50 yards down from the pier, 50 yards out is the same trough with a large hole. Further down to Seaton Sluice about 200 yards, opposite the car park