Looks like traveline, has the new timetables uploaded.

8 - last bus from Sunderland to Stanley is 22:10pm with the 23:10pm finishing at the Galleries
8 - last bus from Stanley to Sunderland is 21:30pm with the 22:30pm finishing at the Galleries and the 23:30pm finishing at Chester-Le-Street

Sunday service between 9am and 23:00pm
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56 increased to every 12 minutes

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cba to check the rest, haha