David J Hayes says "4H04 was the 03:45 MSuX mixed goods from Carlisle to Banbury and due through Kenilworth at 2:22pm. It ran via Nuneaton where it joined the Coventry/Leamington route. 4H04 was shown in the WTT as running as part of the National Freight Train Plan Service and, I'm guessing, was probably electric-hauled to Nuneaton".

Yes I would say electric to Nuneaton, I cannot recall any WCML freights heading north from there diesel powered and there were always at least 1 or 2 electrics at the south end of Nuneaton having come off freights destined for Coventry.