The trouble with northumberland is there arnt that many free or dayticket ponds/ lakes to fish. The best option is to join a club, there are a few to choose from. WACAC, Bigwaters AC, Blyth AC, Leazes and district AC. Just google them to find out more. If your not into joining a club ill list a few of the free/ dayticket places. Not sure where u get the tickets but...........
Killingworth lakes have a very nice head of carp in up to 24lb, last i heard. It also contains pike to 20lb, roach, perch, tench and bream. Trouble is, it can be a hard lake to fish. Maggots are virtually useless because of the amount of sticklebacks present. Corn and pellet do well on there day. The small lake used to hold some good fish but was very weedy.
Bolam lake is a dayticket lake, these are purchased from the postoffice at belsay garage. It holds a good amount of pike to 10lb, lots of perch and rudd. Ledgered worm will get the perch, smelt or red sprat deadbait for the pike.
Felton fence is a good choice if your starting out, tickets are purchased from the bankside. There is 4 ponds to choose from, with mallard being my favourite. Loads of coarse species plus the chance of a nice carp.
QE2 in ashington is also fishable on a dayticket, you get these from the bar at the hotel at the top of the lake. A S/W wind is best when fishing here. Its a hard lake to fish but on its day the bream/roach fishing can be excellent. There are also pike to 20lb and carp to 25lb in the lake.
Ive never fished the free pond at burradon so cant tell u much about that one.
Hope this helps.. roppa