Southbound express passing Kibworth North signal box, viewed from Warwick Road overbridge. This class would be far from common on the Midland main line, perhaps it is a diversion heading back to the LNWR metals via the Market Harborough to Northampton route having arrived by the Nuneaton to Wigston line.
However D209 was an ER loco at the time of the pic, D209 does not have a yellow warning panel. It is a Hornsey loco, if before 09/61, or Stratford if after 09/61.

I'm wondering if it a weekend working from the Sheffield area using the loco off Friday evening's Master Cutler.