Metrocentre to Newcastle - 43/44.
Newcastle to Gateshead - 27
Gateshead to Metrocentre - X66
Metrocentre to Gateshead - 49/A/B/C
Gateshead to Coast Road - 58
Coast Road to Newcastle - 309/310 (can't remember if it's both?)
Newcastle to Gateshead - 58
Gateshead to South Shields - 27
South Shields to Sunderland - 35/A/B/C
Sunderland to Washington - 2A/2C.
Used some of the same buses twice for different journeys, but they've not done the same return.
EDIT: Bugger - used the 58 twice.
A nice way to finish the day would have been:
Washington to Heworth - M1 (if travelling next month).
Heworth to Newcastle/Gateshead - 27/58.