Sorry, I should have published my revised hosts.cfg line:

0.0.0.0 Website # noconn sni https://www.website.com/

I now get a green status, an ?HTTP/1.1 200 OK? response ? and the certificate info too:

SSL certificate for https://www.website.com/ expires in nnn days

Server certificate: <data removed>

Cipher used: TLS_AES_256_GCM_SHA384 (256 bits)

Thanks for your help, Matt.

Kind regards

Martin