Hi @emma
An update here:
We released a fix for the empty brand/theme pages and the links that you reported before are now yielding a 404 response. For instance, http://www.broughtons.com/store/search/brand/Outdoor-Nautical-Lighting/
Also, I understand the issue with the metadata is solved as per 119274: HTML Headers (metatags) missing from Department, Category pages - #8 by david_acheson
I will get back to you once the patch for the 301 redirects is in place. I should stress that this issue is only affecting stores with legacy URL scheme.
Thanks for your custom.
Regards,
Franclin