I saw the thread was closed, but actually want to defend the newspapers on how close this really was. A family member saw it and initially thought they were flying formation, before common sense clicked in and they realised something had gone really wrong.
According to ASA Webtrack, (12 Oct 9:16am)
WebTrak , they aircraft were less than 100ft apart vertically and not much horizontally.
Everyone keeps dismissing this as "fear-mongering"... but this was actually a bloody close call in the scheme of things.