Scotland Yard officers carried out inquiries as part of Operation Alice, the investigation in connection with an incident involving then Cabinet minister Andrew Mitchell in Downing Street.
A copy of the file handed to the Crown Prosecution Service was also given to the Independent Police Complaints Commission, which is supervising the investigation.
The incident in September last year became popularly known as "Plebgate" following claims, denied by Mr Mitchell, that the MP called officers "plebs" in a dispute.
More top news
At the Royal Berkshire Hospital in Reading, ITV News met the beds manager who is tasked with finding enough beds for the day's patients.
Windy, wet and mild
The actor, who was best known for his role in The Likely Lads, has died aged 79.