Confidence: It might be this.
Notes: Despite reading different articles, and studying photographs, still struggling to tell the difference between the meadow and tree pipit. I could point to the seemingly smaller bill, or not so streamlined body, but I think I am probably subconsciously playing the odds. Went for meadow pipit. Although spotted on farmland, one side opened to the Brecon Beacons, and on the other was woodland.