Unexplainable bright object in sky

Sister rang me to tell me to look out the front door at something in sky, I could see a big bright object that seemed to be still! I then got into my car and drive towards what ever this object was about 5 minutes down the road it appeared to me the object looked to be getting bigger and looked as though the sun was beaming on the top and a dark underneath! All of a sudden the object disappeared! I then made my way home stopping at a fuel station on the top of a hill, I looked back into the distance and could see the bright object again what seemed to be above bradgate park only this time it was moving quickly to the right with some sort of flashing light!