Edge Universal SSL not working

Hi all, I have several sites on Cloudflare all working beautifully but I am struggling with my latest one:
The base URL is lambwatch.co.uk and I have a subdomain camgrabs.lambwatch.co.uk which is using the Edge Universal SSL.

Or rather, it should be, but it isn’t.
The domain is active, the nameservers updated, the SSL has been issued and is activated, but the domain https://camgrabs.lambwatch.co.uk is just plainly refusing to pick it up. The A record is also correctly proxied.

Any thoughts folks?

Perhaps a local DNS caching issue. It has a valid SSL cert.

 curl -Ikv  https://camgrabs.lambwatch.co.uk
*   Trying 104.21.6.177:443...
* Connected to camgrabs.lambwatch.co.uk (104.21.6.177) port 443 (#0)
* ALPN: offers h2,http/1.1
* (304) (OUT), TLS handshake, Client hello (1):
* (304) (IN), TLS handshake, Server hello (2):
* (304) (IN), TLS handshake, Unknown (8):
* (304) (IN), TLS handshake, Certificate (11):
* (304) (IN), TLS handshake, CERT verify (15):
* (304) (IN), TLS handshake, Finished (20):
* (304) (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / AEAD-CHACHA20-POLY1305-SHA256
* ALPN: server accepted h2
* Server certificate:
*  subject: CN=lambwatch.co.uk
*  start date: Oct  6 12:20:10 2023 GMT
*  expire date: Jan  4 12:20:09 2024 GMT
*  issuer: C=US; O=Google Trust Services LLC; CN=GTS CA 1P5
*  SSL certificate verify ok.
* using HTTP/2
* h2 [:method: HEAD]
* h2 [:scheme: https]
* h2 [:authority: camgrabs.lambwatch.co.uk]
* h2 [:path: /]
* h2 [user-agent: curl/8.1.2]
* h2 [accept: */*]
* Using Stream ID: 1 (easy handle 0x13d00dc00)
> HEAD / HTTP/2
> Host: camgrabs.lambwatch.co.uk
> User-Agent: curl/8.1.2
> Accept: */*
>
< HTTP/2 200
HTTP/2 200
< date: Fri, 06 Oct 2023 13:53:58 GMT
date: Fri, 06 Oct 2023 13:53:58 GMT
< content-type: text/html
content-type: text/html
< last-modified: Fri, 06 Oct 2023 11:24:35 GMT
last-modified: Fri, 06 Oct 2023 11:24:35 GMT
< accept-ranges: bytes
accept-ranges: bytes
< cf-cache-status: DYNAMIC
cf-cache-status: DYNAMIC
< report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=YN5bOsIghDC7RIvKN9Y%2BDkSlAr3m83BKnK6oWAZtf5fH3EVnb4yz4iVkLbkKCOqRUnKcMcl3O4aYs7Wp%2B9NxaV9FixeOqRAQRlAkJWA0Eits2o8KGCTuyW1zOt9IzWbmeswZ24ZPqxJwk9A%3D"}],"group":"cf-nel","max_age":604800}
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=YN5bOsIghDC7RIvKN9Y%2BDkSlAr3m83BKnK6oWAZtf5fH3EVnb4yz4iVkLbkKCOqRUnKcMcl3O4aYs7Wp%2B9NxaV9FixeOqRAQRlAkJWA0Eits2o8KGCTuyW1zOt9IzWbmeswZ24ZPqxJwk9A%3D"}],"group":"cf-nel","max_age":604800}
< nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
< server: cloudflare
server: cloudflare
< cf-ray: 811e64c08b558c53-EWR
cf-ray: 811e64c08b558c53-EWR
< alt-svc: h3=":443"; ma=86400
alt-svc: h3=":443"; ma=86400


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