A serviceman who urged people to join the military as "you get to kill" black people "without going to prison" has been jailed after a colleague refused to work with him.

Senior aircrewman Michael Saunders, of the RAF Regiment, wrote the comment on Facebook underneath a video showing black men assaulting a white woman, a military court heard.

The 26-year-old, who serves at RAF Honington, in Suffolk, posted the message under the clip, which had been liked more than 3,000 times, at some point between May and August last year.

Despite him removing the message quickly, a colleague spotted the remark and posted it in a private "lads only" WhatsApp group because he was so appalled.