There is track work re-modelling taking place at Leeds Midland Road, and it seems possible that some Class 70s were worked south prior to this.
70015 (nearest), 70003, 70002, 70007 and 70019 (farthest) seen at 10:44 on Saturday morning.
70007 had arrived on 4O31 from Leeds on Thursday; 70019 on 4O95 from Leeds on Friday (with 66540). 70019 seen receiving attention to a headlight.