Looks like last pax working for 004 was on 1H80 (04:53 HHD-CTR) on 16th July coupled to 175116.
175011 went from Chester to Crewe Gresty Green on 16th June. Last pax working looks the be on the 6th June as 1V40 11:30 MAN-CDF. Followed by an empty stock from Canton to Chester on 8th June