An update from BA on this topic and I've updated post #2 including the link. Here's a small summary, full details in the link itself.

TRAVEL EXPERIENCE FOR DEAF AND HARD-OF-HEARING CUSTOMERS TO IMPROVE WITH NEW BRITISH AIRWAYS PARTNERSHIP

4 December 2023: British Airways has partnered with Signcode UK to further improve its accessibility offering for Deaf and hard-of-hearing customers, with new signed video content containing a variety of helpful travel information being made available to customers both pre-travel and whilst on board.

https://mediacentre.britishairways.c...rship?ref=News

• British Airways is partnering with Signcode UK, an organisation dedicated to ensuring equal access to information, products and services for the Deaf and hard-of-hearing community
• The partnership will mean customers can access key travel information in signed video form, including the airline’s onboard safety briefing via a unique QR code
• It is estimated that more than 150,000 people use British Sign Language (BSL) as their primary or preferred language in the UK, making this partnership an important step forward in ensuring British Airways’ service is accessible to everyone