bright oval light about 3 feet wide and 5 feet high,similar to a very very bright headlight.

it travelled from just under a mile away to 20 feet behind me in 5 seconds then stayed behind me for 2 to 3 seconds then moved suddenly to my left into fields at tremendous speed whilst still shining forwards.

i was driving home from work towards rugby heading from princethorpe in the middle of the night with no other traffic. the road is a straight mile long where you can see traffic clearly coming towards you and behind you and there was nothing on the road before the light appeared. there are acres of open fields to the left and right of the whole stretch of road.it was not in the sky or hovering,it was the same height as my rear window and lit up the road ahead of me and the inside of my car.