You might want to try the UK national archives: https://www.nationalarchives.gov.uk/ https://www.nationalarchives.gov.uk/ or get in touch with the enthusiast

You might want to try the UK national archives: https://www.nationalarchives.gov.uk/ https://www.nationalarchives.gov.uk/ or get in touch with the enthusiast community, people like https://www.nathanmediaservices.co.uk/ceefax/ https://www.nathanmediaservices.co.uk/ceefax/ You should ensure whoever you give them to can give you a binding commitment to use for legitimate archival purposes, and not just acquire them and sit on them for copyright reasons.