Ah, I thought it ran just behind the 21A without looking at the timetables. Scrap that suggestion then, but have it retained.
Problem with the X10 at Peterlee is that it doesn't stop in the bus station. It stops just off on the little off-shot road which isn't ideal for customers. When you think of getting around, you think 'bus station' - not 'shall we go to the motorway today?' I have seen a few people get on there, but very few alighting. This service is more local to you I guess so you may be able to pick up more accurate information through experience, but I've certainly not seen the X10 actively used in Peterlee.
If the X7 was to be timed so that it was the same arrival time as the X10 in Peterlee, it would be a 30 minute frequency from the bus station to Middlesbrough, rather than someone having to walk for 10 minutes from the bus station to get to that stop for the X10.
RE: Go North East Service Suggestions