More likely -
5L50 1216 Wembley - Ilford was ROG operated, as was 5H72 1315 Ilford - Wembley 03/02
720550/507 were reported at Wembley on 04/02
GA units often visit Wembley for attention. Wheel Lathe?
GBRf do all the 720 moves before acceptance by GA.
I would guess 720510/516 on
Real-time train running information for 5Q22 1542 departure from Kilburn Up & Down Gds Lp to Ilford E.M.U.D. on 05/02/2025. From Realtime Trains, an independent source of train running info for Great Britain.
www.realtimetrains.co.uk
720516/143 were reported on 5G33 0815 Ilford - Southend 06/02