According to the advertisement, the role involves “explicit dialogue” and “performing for clients’ or customers’ fantasies”.

Astonishingly, the Department for Work and Pensions insisted that it is legally obliged to carry the advertisements after a test case brought by the Ann Summer sex shop chain in 2003.

However politicians and family campaigners lined up to criticise the policy, claiming it legitimises the sex industry and encourages women to work in it.

According to the Daily Mail, the controversial advertisement was posted in a Jobcentre Plus branch in Cardiff, South Wales and nation-wide on the agency’s website.

It offered an hourly wage for women to work 15 to 40 hours a week, between 9 p.m. and midday. There is no pension.

Placed by a company called Cybtrader, the advertisement - which remains within legal boundaries - was unshamedly brazen when it came to describing exactly what the role entails.

Yesterday family campaigners lambasted the Jobcentre’s decision to carry the advertisement.

Adrian Rogers, of the Conservative Family Institute, said: “It is outrageous that this kind of work is advertised in Jobcentres. It is very important that we do not legitimise the sex industry like this.”

Hugh McKinney, of the National Family Campaign, said: “There is a real danger that impressionable young adults will be forced into these amoral, degrading and inappropriate jobs. ”

Elsa Hill, a manager at Eaves, a charity that houses women trafficked into prostitution, said: “It is wrong. The Jobcentre should have and could have rejected the advertisement.”

“It is the Government’s responsibility to do something about this: they should be looking at criminalising the buying of sexual services, not advertising it and encouraging it,” she added.

Conservative MP Ann Widdecombe said: “People who are very vulnerable and desperate coming into Jobcentres. They shouldn’t be exposed to that sort of thing. It is quite wrong.” (ANI)