4502 and a Pulsar (can't recall which) on the 21a this afternoon
4652 ended up on 28s from 1525, replacing 4506 which then replaced 1512 on 27/X5 so 1512 could go back onto 5s to replace 1552 (1512 will be presently be inbound on the 5 from Easington).
RE: Arriva North East: Rare & Odd Workings - April 2015