(23 Dec 2021, 12:12 am)N391OTY wrote 6177, 6179 and 6182 all appear to have entered service Wednesday 22nd at Chester-le-Street, while 6180 has returned to Washington. (All taken from bustimes, not my own observations).
More surprisingly, has 5236 really returned to service at Riverside ?
That's 5259 tracking as 5256