Saw flying saucer with coloured lights in 1978 and then a different craft in 1979.

Walking along a road in Walberswick along the coast with a friend.  Looked up and saw in the distance, coloured lights, thought it was a helicopter at first, there is a US base nearby.  Then the object came closer and was clearly a flying saucer.  The object had a band of moving lights around the centre of the craft.  The lights were all different colours they did not merge but moved around.  The craft manoeuvered fast, shot up and down then away then back then hovered sometimes coming almost above us.  It was a spectacular sight.  We were absolutely transfixed to the spot. There was so much movement and changing position.  The speed of the craft was phenomenal. Then the craft went away and we stayed for 30 mins or so and thought it wasn't going to come back, but then it did and it all started over again.  I don't really know how long we were there.  There was no sound, the craft was large and moved like nothing I had ever seen before. Finally it went away.
 A year later in central London I was walking alone to work early one sunday morning, I looked up and there was something I thought at first was a helicopter, the sun was reflecting off a very shiny, but matt, silver coloured object.  Then I realised it was not a helicopter, there were no blades rotating it was just this thing in the sky, completely motionless and again no sound.  I stopped and stared at it.  It had no windows no lights no nothing and it was a cone shape.  Then in shot up and stopped and then came down again and finally just shot straight up into the sky and disappeared.
 I believe that the second sighting was linked to the first.  I beleive that even though I have no recollection of it, that at the first encounter something happened that has been wiped from my memory.  There is no fear attached to this, although I have the feeling they are coming back one day.  It is impossible to explain how or why I feel this, I just know it to be true.
 At the time of these sightings I was 17 and 18 years old.  I am 42 now. I am a tax adviser.  I seek no publicity and I know what happened.