I am grateful to those who contacted me with the answer to the question, who runs the Belfast Daily website?
I have been informed that it is run by the company Donegal Daily Ltd, which also operates the Donegal Daily website. The company is based at Tullygay, outside Letterkenny, and is run by Stephen William Maguire and Brenda O'Neill. According to a directors website 'Stephen William Maguire is Irish and was born in 1970.' The company was established in January 2011 and this was his first directorship. Brenda O'Neill was born in 1967 and joined the company at the end of December 2011.
That leaves us with a second question. Who was the 'senior security source' who provided them with the erroneous story and did they attempt to check out the information he gave them before publishing it? Even the BBC has been reminded in recent days abotu the importance of checking cources.
I am also grateful to those who have suggested who the 'source' may have been and indeed it is quite possible that it is someone with a grievance against the PSNI.
Finally. now that their story has been refuted and is clearly untrue, what do the owners of the Donegal Daily and the Belfast Daily intend to do? Will they publish a retraction and will they avoid in future someone who was clearly an unreliable source?