First off as always thanks to anyone who can help on this one.
We've switched our site across to https for security reasons and our SSL works fine across the domain (after many fixes), however Soundcloud is gold is the only thing left to sort.
In debug we get:
[blocked] The page at 'https://www.xxxxxx.com/artist/jon-rundell/' was loaded over HTTPS, but ran insecure content from 'http://w.soundcloud.com/player/?url=http%3A%2F%2Fapi.soundcloud.com%2Ftracks%2F82930914&auto_play=false&show_artwork=true&color=ff7700': this content should also be loaded over HTTPS.
Which simply means the referring link needs to be https rather than http. Has anyone encountered this or know a way to fix it?