Browser Cacheing - HTTPS redirects to HTTP

[HenryFrance]

Howdy lovely Moz people.

A webmaster redirected https protocol links to http a number of years ago in order to try and capture as many links as possible on a site we now manage. We have recently tried to implement https and realised that because of this existing redirect rule, they are now causing infinite loops when trying to test an http redirect. http redirecting to https redirecting back to http, etc. The https version works by itself weirdly enough. We believe that this is due to the permanent browser caching. So unless users clear their cache, they will get this infinite loop.

Does anyone have any advice on how we can get round this?

a) index both sites and specify in GSC that the https is the canonical version of the site and hope that Google sees that and removes the http version for the https version

b) stick with http as infinite loops will kill the site

c) ???????????

Thanks all.