Seems to be sorted.
Yep.
I just got a phone call 10 mins ago from the Helpdesk of Openreach also stating it working fine for them.
So from between 9 am to 4 pm the SSL Cert was renewed.
[Connection]
Protocol: TLS 1.2
Key Exchange: ECDHE_RSA
Cipher Suite: AES_128_GCM
[Certificate]
Subject: api.superfastmaps.co.uk
SAN: api.superfastmaps.co.uk
Valid From: Tue, 19 Jul 2016 00:00:00 GMT
Valid Until: Thu, 20 Jul 2017 23:59:59 GMT
Issuer: GeoTrust DV SSL CA - G3
SCTs: 2 valid SCTs
But at least its now back up.
Paul