You know you are having a bad day when the Police try to arrest you for paedophilia and take a rather keen interest in the contents of you hard drive – particularly if you have done nothing to warrant such attention and it is all because of a typo.

On a Saturday morning in July 2011, Nigel Lang, then aged 44, was at home in Sheffield with his partner and their two year old son when a man and two women knocked on the door.

When he opened it, the three pushed past him and one of the women, who identified herself as a police officer, told Lang and his partner he was going to be arrested on suspicion of possessing Indecent Images of children.

He was told that when police requested details about an IP address connected to the sharing of indecent images of children. But the coppers had typed in the wrong IP address and had raided the wrong physical location.

But it would take years, and drawn out legal processes, to get answers about why this had happened to him, to force police to admit their mistake, and even longer to begin to get his and his family’s lives back on track.

Police paid Lang £73,500 in compensation last autumn after settling out of court, two years after they finally said sorry and removed the wrongful arrest from his record.