(25 Mar 2018, 9:26 pm)ross13 wrote I thought 1406 was a temporary transfer with an X66 board

The X66 boards appear to be more than a temporary transfer - the change registered on Friday from the 20th May sees the 2130 66 to Whinfield replaced by an X66 at the same time to Middlesbrough to cut the dead mileage incurred by Stockton at present.
1416 was returned due to a number of issues.