7504 was following 7501 through Bedlington on the X21 earlier, before overtaking it. One of them was the 13:28 through towards Newbiggin, running 4 minutes late, the other 24.
I followed 7501 for a bit after 7504 overtook it, whoever was driving didn't touch 20 on the stretch of road where I was behind it.
RE: Arriva North East: Latest News & Discussion - November 2015