@duckinator @Netlify I'd not expect this to be caused by @o2 classifying sites served from a given hosting provider as mature content, but some other frustrating misclassification of your site.
I see that you can report misclassifications to o2 directly via: https://www.o2.co.uk/help/safety-and-security/age-restricted-content-and-age-verification
My tweets and posts live here on my own domain these days.
You can explore them here and follow me on Mastodon instead of Twitter where I'm not currently active.