An officer cleared of concocting a cover-up story for a colleague who knocked out a student's front tooth will still face disciplinary action. 

PC Calvin Lindsay, 31, from Leytonstone, was among three officers accused of perverting the course of justice when William Horner was assaulted during a tuition fee protest in 2010. 

Metropolitan Police officer PC Andrew Ott was jailed for eight months yesterday (May 20) after being convicted of causing actual bodily harm at Southwark Crown Court the day before. 

The 36-year-old officer from Kent knocked out part of Mr Horner's tooth with a full force blow of his riot shield after Mr Horner tried to escape from being 'kettled' in. 

Ott was cleared of falsifying an account of the incident. 

PC Lindsay and PC Thomas Barnes, 31, from Kent were also cleared of perverting the course of justice for allegedly helping Ott come up with a cover story for the incident, particularly a reason why Mr Horner should be arrested. 

Mr Horner was not arrested or charged following the protest. 

During court proceedings, both officers were on restricted duties and will face disciplinary action.   

The Independent Police Complaints Commission (IPCC) said Ott's conviction had been achieved following its investigation.

It added: "The IPCC investigation found that all three officers have a case to answer for gross misconduct and they will now face disciplinary hearings, which will be carried out by the Metropolitan Police Service.

"All three officers were policing the protest on 9 December, when a 20 year old student suffered a damaged tooth while he was being detained by PC Ott.  

"The Metropolitan Police referred the matter, including a complaint made by the student, to the IPCC."