Right so first thing - what was the weather like that night? Asking because the Pendle area where I am gets some genuinely weird atmospheric effects that can make light sources do very strange things, and a lot of people write those off without investigating further. But I've also photographed things over farmland that had absolutely no logical explanation once you rule all that out.
The hovering is the key detail for me. Drones drift slightly, helicopters make noise, weather balloons move with the wind. True hovering with no drift is a much smaller category of explanation.
If you can get back out there tonight or tomorrow, take photos of the exact location in daylight and try to note any reference points - treeline, pylons, that sort of thing. It helps massively when people try to replicate the geometry of what you saw. Also worth checking if there are any ley line intersections near that field, I've found those spots tend to accumulate reports over time and yours wouldnt be the first from farmland like that.
What did it look like when it eventually left?