I had the exact same issue last summer, and it turned out to be just a faulty bulb holder rather than any complicated wiring problem. After swapping it with a second-hand part from a breaker's yard, the brake light has been working perfectly ever since. It was such a relief to finally sort it out, and to relax afterwards, I watched some Premier League highlights and placed a small bet just to make the match more exciting. Honestly, I sometimes enjoy a bit of online roulette in my free time, so I check out https://magius-eng.co.uk/ when I'm not tinkering with the car.