All roads lead to Wales...
I'm going to make a guess at somewhere on (the) Welsh Road, which those who've cycled in South Warwickshire may know. It sometimes goes by this name, sometimes by others, but can be traced from the MK area up through Southam and towards Warwick.
I haven't got time right now to scour its whole length, but I'd be looking for that little wiggle followed by a rise, and maybe heading
away from Wales to judge by the shadows.