I see that BHW does have an SSL certificate. It would be nice on the new site to have an .htaccess rule (Or maybe the new forum has a plugin to do this for you) where users are automatically, upon visiting the site, redirected to the HTTPS version of the page they're on. I also noticed when examining the cert that there are elements on the pages (On this forum at least) that are insecure/not loaded via HTTPS/SSL so it throws a warning. That's usually easy to fix as well. The certificate you already have is up to current standards so no need to get a new one in that regard.