The answer to this question is now here: Time to blow the whistle on shops
Warning: Law and circumstances can change very quickly. Please note the date of publication of any blog post and check for any updates on the issues addressed. In any event, we do not condone or encourage breaching the law and neither the above nor any information posted on this website constitutes legal advice. It must not be relied upon as such and specialist legal advice should be taken in relation to specific circumstances. Please read our disclaimer.