Since the ash from the Icelandic volcano has resulted in a full UK ground stop for days now, the springtime sunshine and blue skies are untroubled by the sound of planes, or their visible evidence in the skies. For the first time in ages, we have a properly blue sky.
EDIT: Interestingly as I was just browsing Twitter I came across this post, retweeted by my friend @yezzer: @ruskin147: One of the weirdest things I’ve ever seen in the sky over West London