Derek Burden was working on the 16th floor of a building in Covent Garden in the capital's West End when he took the picture at 8.30am. But it was only when he looked at the image a few days later with his wife Sarah that he noticed the eerie shapes in the cloudy sky.
Mr Burden, 40, said: 'I was waiting for some materials to arrive so I thought I would step out onto the balcony to have a cup of tea. I was 16 floors up and I thought I would take some pictures of the view for my wife who doesn't get to come to London much. I didn't notice anything at the time because I was focusing on getting in all the sights but when I showed Sarah that weekend she said "What are those lights in the corner?"'
Mr Burden, from Luton, said the lights are not any kind of reflection, claiming he took the picture outside with no office lights behind him. He added: 'The picture clearly shows four saucers all the same size. I've shown loads of the guys on the building sites and they're all amazed.
Source: Daily Mail