It is a school like no other, one that offers professional instruction in how to sell your body for money.

For a €100 (£80) fee, pupils at Trabajo Ya! (Work Now) in Valencia are offered a “basic course in professional prostitution with maximum discretion”. But Spain’s first prostitution school has faced a legal challenge from campaigners seeking to close it amid growing public intolerance towards the world’s oldest trade.

Valencian prosecutors threw out the challenge yesterday, ruling that there was there was no case to answer. They said that no proof existed of a criminal offence because advertisements for the school were not directed at minors, nor did they promote prostitution or constitute fraud.

Shortly after the school started advertising its courses in May, the