The Ministry of Justice (MoJ) has had one of its adverts banned, for being likely to cause “serious offence” by “reinforcing negative stereotypes about Black men”.

The ad for the MoJ’s Prison Jobs scheme, which ran this summer, featured an image of a white prison officer talking to a Black inmate, with superimposed text stating: “Become a prison officer. One career, many roles.”

A caption accompanying the image read: “We’re key workers, problem solvers, life changers. Join us to perform a vital role at HMP Wormwood Scrubs.”

A reader complained that the ad perpetuated negative ethnic stereotypes and was likely to cause serious offence.

The MoJ said the photographs used in the ad campaign featured real officers and prisoners, arguing that it did not therefore “portray” a Black man as a criminal but rather depicted a real person who had been convicted of an offence.

It said it was not therefore an inaccurate or unfair representation of the type of engagement that might have been seen between officers and prisoners.

The MoJ said the image formed “one small part” of the overall campaign – accounting for less than 5% of its spending on the ads – “which used a wide variety of images and showed officers of different ethnicities, interacting with each other”.

It added that none of the other images used in the Facebook part of the campaign showed white officers alongside ethnic minority prisoners.

The Advertising Standards Authority (ASA) noted all this, but pointed out that viewers would be likely to see the advert in isolation on Facebook.

The ASA said: “The ad made reference to prison officers being ‘problem solvers’ and ‘life changers’, and we considered it drew a link between the officer depicted and those attributes. On the other hand, the Black prisoner was depicted as a criminal, without those positive attributes.

“We considered the ad did not suggest that all Black men were criminals or were more likely to be so than any other ethnic group.

“However, it showed an imbalanced power dynamic, with a smiling white prison officer, described as a ‘life changer’, and a Black, institutionalised prisoner.

“We considered the ad’s focus on the positive qualities of the white prison officer and negative casting of the Black prisoner was likely to be seen as perpetuating a negative racial stereotype.

“We concluded that the ad was likely to cause serious offence on the grounds of race by reinforcing negative stereotypes about Black men.”

The ASA ruled that the ad must not appear again, adding: “We told the Ministry of Justice to ensure they avoided causing serious offence on the grounds of race.”