It looks like the new GHIC (Global health insurance card), that replaces the EHIC (if you have one of those then no need to apply for the new one it does the job) is now live on the NHS site on the following link:
https://nhs.uk/using-the-nhs/healthcare-abroad/apply-for-a-free-ehic-european-health-insurance-card/
"A European Health Insurance Card (EHIC) gives you the right to access state-provided healthcare during a temporary stay in the EU.
The UK has reached an agreement on healthcare when visiting the EU.
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You can continue to use an EHIC or get a provisional replacement certificate (PRC) if you need treatment and do not have a card.
If you apply for a card now, you'll get a new UK Global Health Insurance Card (GHIC) instead of an EHIC. These pages and the application portal will still refer to EHIC until 4 January 2021.
You do not need to apply for a GHIC if you already have an EHIC. Your EHIC remains valid in the EU until it expires.
Beware of unofficial websites, which may charge if you apply through them. An EHIC or GHIC is free of charge."
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