I had seen the object a few times before in the same general areas, along with two of my friends that had seen and heard it before in a different place. We were sitting in a car, at the top of Llangynwyd, when we noticed the light, flashing as it usually does. Then it began to gain speed and was almost directly above us flying lower as it flew across the sky. It was making a low pitched humming/whirring noise like a helicopter but a lot lower in pitch. It looked disc shaped as we watched it get closer and then it gained speed, quickly, and flew off in the direction of Pencoed.