It blames young, single and ‘jealous’ women in personnel departments who screen which jobseekers should be invited in.

But in an example of the ‘double standards’ that the researchers said these staff employed, attractive men who attach a photograph are more likely to get an interview than plain ones.

Staff in personnel departments are overwhelmingly female, typically single and aged 29 on average, the researchers found.

Their report concludes: ‘The evidence points to female jealousy of attractive women in the workplace as a primary reason for their penalisation in recruitment.’