Both myself and my brother witnessed the following event.On the evening of 21 January both myself and my brother were watching RAF C-130 Hercules military transport aircraft.For almost the entire evening(18:00-23:00)they were noticable and I presume they were doing some sort of low level air training for Afghanistan or Iraq.At approximately 21:50 an RAF C-130 Hercules passed almost directly over our house at an estimated altitude of 2500 feet. Very quickly, we noticed that it appeared to be unusually illuminated as though there was a very powerful red light (like firework)on the top of the aircraft enabling us to only see the silhouette of the Hercules.The aircraft continued to fly in a straight line, yet the light moved from being on top of the aircraft to following it from a close distance. It did this for a short space of time and then suddenly burst infront of the aircraft almost half a mile in less than a second. The acceleration was unbelievable. The light maintained this distance for a few seconds and then once again burst backwards at very high speed and continued to follow the aircraft. The light then stopped in mid air, and then shot up into the sky at an immense speed.The light appeared to have a very intense, almost white, oval shaped centre which was possibly a 1/4 of the Hercules's lenght. When combined with the 'fuzzy' light which surrounded this bright centre the light was possibly half the lenght of the Hercules. For the record I am 17 and my brother is 14.I am unable to say whether the object made a noise as the aircraft made too loud a noise to notice any other sound.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))