Professor Ford's focus on Brexit and Worker Rights outlines the progressive nature of EU employment rights, which has resulted in the protection against discrimination on age, sexual orientation and relgious beliefs. The EU's history of supplementing or overwriting the domestic regime, almost always in favour of worker rights, is also analysed.
The worry of Brexit would be the UK government's legal freedom to rewrite workers' rights and laws, without having to adhear to the progressive and protective regulations already in place. You can read Professor Ford's post on the University of Bristol Law Shool's Blog.