Police are appealing for information after a charity collector dressed as Pudsey Bear was attacked at Piccadilly Station.
British Transport Police have released a picture of a man they want to speak in connection with the incident.
They say a man approached the victim from behind and kicked him in the back while recording it on his phone.
BTP say they are 'keen to speak to the man in the CCTV image as he may have information that could assist with their investigation'.
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The attack took place at just before 8pm on November 19 on the station concourse.
Anyone with information is asked to contact BTP by texting 61016 or calling 0800 405040 quoting reference 336 of November 19, or Crimestoppers anonymously on 0800 555 111.
