On july 15 RAF ZZ-330 and ZM-149 and ZM-150 were flying over the island of Texel showing some wonderfull contrails. Altitude was between 29 000 and 32 000 feet so I needed to crop a little but the colours are real.
IMG_2791psp by piet druif, on Flickr
IMG_2766psp - kopie by piet druif, on Flickr
IMG_2748psp - kopie by piet druif, on Flickr
IMG_2688psp by piet druif, on Flickr
IMG_2796psp by piet druif, on Flickr