British Airways said it has launched an investigation over claims a mystery stewardess is advertising for sex in between flights.

The air hostess is thought to entice clients by taking racy shots of her uniform mid-air and sharing them on social media. She is also believed to be selling her knickers online and offering ‘on-board adult entertainment’ to anyone willing to pay.

One shot shows the stewardess hitching up her skirt in the galley kitchen while another shows her in the toilets wearing only tights, with the caption: ‘No panties on Sundays.’

Using the name AirHostess71 on her blog, the crew member says: ‘You will need to pay a securing fee of £50 to meet. Prices vary depending on the requested meet — no negotiating. ‘If I have booked a hotel for work, the meet will take place there (London).’

‘If you ever want adult entertainment on-board, all you have to do is give me a sum of money and you’ll be treated to a whole different experience of your choice.’

She has been charging £25 for a pair of her knickers and also says she’s happy to meet punters overseas if she is away with work, adding: ‘You would need to book another hotel for protection and privacy.’

An employee of the airline told the Sun: ‘She is clearly prostituting herself and boosting her business by using photos taken on board BA planes.

‘She is wearing the airline uniform and there’s no doubt she’s a stewardess. It is shocking dereliction of duty and not the image BA wants of its cabin crew.’

Another crew member was more sympathetic, pointing out that times have been tough for people in the airline industry, many of whom have had pay cuts amid the coronavirus crisis.

However they warned the stewardess is ‘placing herself in great danger’ by advertising her services in this way.

A British Airways spokesman said: ‘We expect the highest standard of behaviour from all of our colleagues at all times, and we are investigating the claims.’