(01 Jun 2023, 11:25 pm)V514DFT wrote Yes they did, 2006/2007
The 343/4 has constantly been ran by Arriva (Northumbria and United before that). I've checked with my friend who lives in Killingworth and he agrees with me.
Around 2006/7 they had the 350/351, on top of that they had the Killingworth local service K1/K2. They also did the Evening and Sunday runs on the 101.
I've checked through all my Classic Buses photos from that time period, and if they had ran on the 343/4 I would have least have a record of it.
A Thursday Evening 101 - https://www.flickr.com/photos/gjm-photog...9581563692
A Sunday Afternoon 101 - https://www.flickr.com/photos/gjm-photog...9580837238
350 in 2006 - https://www.flickr.com/photos/gjm-photog...9581569922
351 in 2006 - https://www.flickr.com/photos/gjm-photog...9580846203
K2 in 2004 - https://www.flickr.com/photos/gjm-photog...2227120952
350/351 went back to Arriva in 2007 with the transfer of 2 Solos (2504/5).
K1/K2 went to Northumbria Coaches.
101 went back to Arriva but evening and Sunday serverely curtailed around 2007.