More likely same airplane, exaggerated story, different country, bad retelling.

Nothing new here. Anytime something weird happens, the story gets passed around and down, and people retelling it make changes to it. The main clues are exaggerations that don't work, like the cup of coffee at the navigator station. The B-17s didn't have cup holders, and making a "sort of a rough landing" on a grass field would have certainly caused a cup of coffee to go flying off the radio operator's little table... and that's if the crews used coffee cups, which they didn't. Also, there's just no way for an aircraft to make a landing, come to a stop, and sit "idling" without someone taking power off the engines, applying the brakes, and then setting the parking brake. This is why DeBolt's aircraft could make a successful landing but ended up ground looping. Like the coffee cup, these are just flourishes someone over the decades added to the story to make it sound cooler.
But, if you can find documentation of this ghost landing in England, I would love to read it.