Seven police officers have been served with 'Regulation 15 Notices' in relation to the investigation into the "Plebgate" incident.
The notices inform them a complaint has been made or a conduct matter has come to light involving them that warrants an investigation.
Three of those officers, a 52-year-old man, a 46-year-old man and a 46-year-old woman, have been arrested and bailed. All three remain suspended from duty.
A 23-year-old man, who is not a police officer or member of police staff, was also arrested and bailed in relation to the incident.
More top news
It's still pretty wintry out there although the air over the next 12 or so hours will be fractionally less cold than it has been recently.
CCTV shows an acrobatic youth as he caused £5,000 worth of damage when he ran across six cars before attempting a handstand on a seventh.
Detectives have released CCTV footage of the moment a machete wielding thug wearing a mask jumped over the counter at a bookmakers.