PH - BQA 17 Jan 2016, 6:59 pm #194 PH - BQA PH - BQA PH - BQA Posts: 4299 Threads: 21 Joined: Apr 2014 Reputation: 0 RE: Arriva North East: Rare & Odd Workings - January 2016 (17 Jan 2016, 4:53 pm)Davie wrote I think the X18 interworks with the X15 on Sunday's. Not all of them do. I don't think the ones that go up to Berwick interwork. 7513 went up to Berwick.