Are you sure about the use of 37423 to assist? It doesn’t have tightlock couplers nor translator kit.
0Z99 headcode is usually used to get a loco in position for preplanned Thunderbird duties or a loco departing after finishing thunderbird duties. Also the schedule is finishing at DB Cargo A Fan at Wembley rather than Railnet.
Real-time train running information for 0Z99 0820 departure from Leicester L.I.P. to Db Cargo Fan A And B Sdgs on 04/09/2025. From Realtime Trains, an independent source of train running info for Great Britain.
www.realtimetrains.co.uk