47085 Mammoth approaches Oxford on 1 August 1986 with the 5F19 Old Oak Common to Oxford ECS. After a quick runaround, it would shortly head back south with the 1F19 07:46 Oxford to Paddington service. I presume this working is the result of the failure of the booked Class 47/4 loco, as not only would a 47/0 not normally work these trains, but also this ECS is shown as only running on a Monday, not Friday, as here. Also, the normal 04:12 departure from Old Oak would see a much earlier arrival at Oxford than this.