Thats different. NXEA 90s are often tripped to/from Crewe sandwiched behind the loco in a Felixstowe-Basford Hall liner.
DRS have been moving the 90s between Norwich & Crewe since they took over the NXEA thunderbird contract. By checking DRS-Gen + my own sighting on 09/04/10 I have identified the following loco moves
* 37688 dragging 90007 Crewe - Norwich 05/09/09
* 37688 & 37229 dragging 90001 & 90026 Crewe - Norwich 04/12/09 [note 90001 was taken to Crewe by 90016 on a FL intermodal on 08/09/09]
* 37601, 37604 & 37688 90009 Norwich Crewe 10/12/09 (Probably the video seen by Edward111) [cannot find a return working for 90009]
* 47832 dragging 90005 Norwich - Crewe 04/01/10
* 37087 dragging 90005 Crewe - Norwich 09/04/10
* 37059 dragging 20305, 47712 & 90013 Norwich - Crewe 09/04/10.
90009 appears to be the odd one out as the locos normally spend about 3 months at Crewe on exam whereas 90009 didn't appear to be there that long. It was definitely back in East Anglia by the start of January according to sightings on Locoscene so may have been back to Crewe for rectification work, it had its heavy exam in mid 2008.