Officers have released an image of a man they wish to trace after a police officer was attacked during the protests near Old Market Square.
The incident happened on Saturday 3 August.
A police officer was assisting his colleagues with an arrest when an unknown offender has come from behind and punched him.
The officer sustained a cut and swollen lip as well as bruising and swelling to his cheek. The suspect then fled into the crowd.
( Image removed on police request )
Officers have carried out a number of lines of inquiry including a full CCTV trawl to identify the offender. They have now released an image of a man that could help further their inquiries.
PC Thomas Carver, who is investigating the incident, said:
“This was an appalling and cowardly attack on a police officer carrying out his duties and keeping the public safe.
“We are determined to catch the person responsible. We have released an image of a man that could help us further our investigation and are calling on the public’s help to identify him.
“Do you know the man in the image? Are you the man in the image? Please get in touch with us as soon as possible.”
Anyone with information can call 101 quoting occurrence number 24000469392 or Crimestoppers anonymously on 0800 555 111.