(15 Aug 2022, 2:45 am)L469 YVK wrote Hadrian Park definitely doesn't need a half hourly service during the evenings. But pre Jan 2020 (before the 311), this is what operated:

309 ex Newcastle:
19:45, 20:45, 21:45, 22:50 (last one W.Bay only)

310 ex Newcastle:
20:15, 21:15, 22:20, 23:20
* Last 3 via Hadrian Park when 57 was Wardley to NCL only after 20:30

309 ex Blyth:
19:40, 20:40, 21:47
Cobalt @ 20:16, 21:16, 22:21

310 ex North Shields:
19:30, 20:30, 21:30, 22:30, 23:30
* Both 21:30 and 22:30 via Hadrian Park, 23:30 to Norham Road only


To sort it out, this is all GNE need to do:

309 ex Newcastle:
19:49, 20:49, 21:55*, 22:55*
* to W.Bay Cemetery only

310 ex Newcastle:
19:25, 20:22, 21:22, 22:25, 23:30*
* to Norham Road / Verne Road only

309 ex Blyth:
19:39, 20:50, 22:40*
* from W.Bay Cemetery only

310 ex North Shields:
19:29, 20:29, 21:29, 22:06*, 23:11**
* Operates via A191 New York Road and Cobalt Park, omits Hadrian Park and High Farm
* * To Norham Road only

See personally if the operators are all working altogether and there was a ticket for the 309/310/311/306/308/54(Blyth to Cobalt only)

I'd do this instead or as close as possible because of timetabling reasons:

Leaving Newcastle

Last 309: 20:37
310: 20:57, 21:57, 22:57
311: 21:27, 22:27, 23:27

308: 21:12, 22:12, 23:12
306: 21:42, 22:42, 23:42

54: 20:45, 21:45, 22:45 (last 2 54's extended to Blyth to compensate for the loss of 309 and to get back to the depot)

Routes:
310, omits Hadrian Park but additionally does the whole Cobalt loop
311, extended from Hadrian Park to Northumberland Park via 309 route to Village then direct to Northumberland Park to compensate for the lack of the 19 at night.

Arguably having the 54 running extra boards would offer more connections than having the 309 duplicating the 308 pretty much through Seaton Sluice etc and you've now got the 19 running all night (last bus is currently 8pm'ish)