I’ve actually just wired up a few of my domains the way I believe you’re trying to yesterday, so hopefully I can help you nail this down. I do see your js-redirect on bowlerspet.co.uk (httpie) -
jon-fm(master): http https://www.bowlerspet.co.uk
GET / HTTP/1.1
Accept-Encoding: gzip, deflate
HTTP/1.1 200 OK
Cache-Control: public, max-age=0, must-revalidate
Content-Type: text/html; charset=UTF-8
Date: Fri, 05 Jun 2020 16:31:32 GMT
but I also see your redirect from the Netlify subdomain to the primary domain working fine too () so I’m with you where you’re at.
Can you give me some context around the site breakdown on Netlify? Is this two separate Netlify Sites? And which one has which domain(s) applied to that site?
Given those answers, we can rock it out