(18 Aug 2022, 1:08 pm)peter wrote So from October is it expected that the 2/2a in Darlington, X66/67 and 8/15 will go back to their normal timetables? With the X66 going back to Darlington, X12 and 7 boards back to Durham?

No
Stockton’s 8 and 15 will revert to their previous frequency of every 10 minutes - also led to believe the 7 will be extended to Kirklevington at the same time. Hence why 1534/5/6 are in various different stages of being reinstated for service (understand 1534 now has an MOT having put in for test yesterday - but not yet taxed)
The X66 as it is now is how it will stay - every 20 minutes operated by Stockton.
The 2 boards on the X12 currently being covered by Stockton are intended to revert to Durham operation at the time of the Teesside changes - however, there’s a long time between now and then, things could change.