Are you able to see the map via below link

https://api.superfastmaps.co.uk/fibrecities/2.0/

In reply to a post by Woolwich:

Can you see the map on the page I linked to? I can't. I thiught it was because Iwas on an iPad but I don't see it on my Mac either. I've even disabled all the ad and cookie blocks...

Yes works fine thanks for your help

Certificate issue on that one as well.

Strange working OK for me.

Secure Connection Failed

An error occurred during a connection to api.superfastmaps.co.uk. Peer’s Certificate has been revoked.

Error code: SEC_ERROR_REVOKED_CERTIFICATE

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the web site owners to inform them of this problem.

In reply to a post by MHC:

Secure Connection Failed

An error occurred during a connection to api.superfastmaps.co.uk. Peer’s Certificate has been revoked.

Error code: SEC_ERROR_REVOKED_CERTIFICATE

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the web site owners to inform them of this problem.

I am sure their must be a reason why its working for some and not others but I have't got a foggy why it would be.

Exact same message appears on te OR page linked to by Woolwich ...

Could it be down to which browser is in use, in my case Firefox (latest version 95.0.2 64 bit).

In reply to a post by MHC:

Exact same message appears on te OR page linked to by Woolwich ...

I just checked the link on my mobile (both Wifi and 4G) and that works too

In reply to a post by longedge:

Could it be down to which browser is in use, in my case Firefox (latest version 95.0.2 64 bit).

Maybe but my PC and Mobile have nothing in common and both working.