It would be fascinating to hear everyone's theories and ideas. I vacillate between supernatural and man made. Who knows what to think??  It's obvious that these things are becoming more frequent.

http://www.dailymail.co.uk/news/article-3450809/UFOs-Kent-Experts-baffled-six-mysterious-lights-appear-sky-stay-half-hour.html

Here is another link. The story of the two policemen, in UK, who saw a cross shape of lights in 1967 (year of the 6 day war in Israel). There are many other sightings. Stories in abundance. Too many to be dismissed as sheer fabrication by a bunch of nutters.

http://prufospolicedatabase.co.uk/2.htmlhttp://prufospolicedatabase.co.uk/2.html