They have dropped the requirement.

Aer Lingus has announced that its female cabin crew members do not have to wear makeup anymore. The requirement was included in the company's dress code, however it has now been removed. Female staff will also not be required to wear skirts, and will instead have the option of wearing trousers. The airline says that the guidelines have still not been finalised yet. Virgin Atlantic made a similar statement this week, announcing that its female workers no longer have to wear makeup and can now wear trousers, too. Earlier this year, Aer Lingus unveiled its newly revamped aeroplanes. The aim of the new update is to give a more modern image as it continues to expand into the North Atlantic market. A new shamrock design was unveiled as well as new paint for the aircrafts. Apparently, 50 different shamrock designs were considered as part of the redesign process. Aer Lingus says that the new shamrock has been tilted to symbolise "dynamism and speed" while the pronounced heart-shaped leaves were brought on board to reflect "the warmth and hospitality" of the airline. The new branding was released in January across its app, website, check-in and boarding gates, with the rollout fully completed by 2021.