Me my wife and daughter were on holiday in south devon uk we were staying at a holiday park in paignton. Returning to the caravan at about 10pm my wife entered the caravan but as the sky was very clear not a cloud and very little street lighting i asked my daughter if she would like to see a shooting star so we waited outside viewing the star sky, after about 5 minutes we saw a plane crossing the sky navigation lights clearly visible crossing west to east.As the plane was going east we saw another object going in the opposite direction almost straight past the plane glowing white with no navigation lights i thought this quite strange thinking this was a plane. Within a minute i knew this was not the case the object after having past the plane made what i can only describe as a u turn immediate and almost instantly and began to follow, the turn is like nothing i have ever seen before, this tracked the plane until it disappeared into the distance. My daughter was only 5 at the time but saw exactly what i saw she was supprised that a plane could turn so fast!!!! .I have seen more before and after, lights strange objects but nothing like that, feelings yes i do believe that it is possible for life from other planets or within our own.Just one extra thing in the 1950's my mum dad and many other couples were out on a sunday afternoon walk in cardiff, my dad at the time was in british army intellegence signallers in london, my dad never believed in ET,s was never one to cater for sci fi but on this afternoon my mum and dad witnessed a very bright disc come at a fantastic speed stop dead hover and disappear at the same speed away my dad had never seen anything like this OR had heard of any plane or flying vehicle that was possible of this maneuver.