Short routes I can think of....
ASDA Free Bus: Bishop Auckland Bus Station to Bishop Auckland Asda - https://www.flickr.com/photos/gjm-photog...2266028613
Holy Island Shuttle: Car Parks - Lindisfarne Castle - https://www.flickr.com/photos/gjm-photog...3187842383
Mecca Bingo Bus: Gateshead Interchange - Gateshead Mecca Bingo - https://www.flickr.com/photos/gjm-photog...0513124306
Newcastle Park and Ride: Blackett Street - Manors Car Park - https://www.flickr.com/photos/gjm-photog...1867090717
South Shields Shuttle: Keppel Street - Gypsy Green Stadium - https://www.flickr.com/photos/gjm-photog...0814748077
8X: South Hylton - Pennywell - https://www.flickr.com/photos/gjm-photog...2986452722
40: Durham Cathedral Bus - https://www.flickr.com/photos/gjm-photog...0981985628
60: Gateshead Interchange - Gateshead Baltic - https://www.flickr.com/photos/gjm-photog...9485739377
68: Four Lane Ends - Tyneview Park DWP - https://www.flickr.com/photos/gjm-photog...6101025800
105: Byker Shopping Park - Byker Shields Road - https://www.flickr.com/photos/gjm-photog...2152632714
A1: Metrocentre Bus Station - Metrocentre ASDA - https://www.flickr.com/photos/gjm-photog...6562624891
A3: Byker ASDA - Byker Metro & Denmark Street - https://www.flickr.com/photos/gjm-photog...3136613992
G1: Metrocentre Bus Station - Gala Bingo - https://www.flickr.com/photos/gjm-photog...7373231265
IKEA: Metrocentre Bus Station - IKEA - https://www.flickr.com/photos/gjm-photog...1919978616
M12: Pelaw Metro - Fairways Estate - https://www.flickr.com/photos/gjm-photog...2545496341
S1: Metrocentre Circular - https://www.flickr.com/photos/gjm-photog...9119302117
S2: Metrocentre to Watermark (less than a mile each way) - https://www.flickr.com/photos/gjm-photog...9118547863