More than 20 million flowers are set to be sold in the UK for Mother’s Day. Campaigners say that the dire conditions on many flower farms show why the UK needs a new law to ensure workers are protected across entire supply chains. Nick Ferris reports On The Ground newsletter: Get a weekly dispatch from our international correspondents Get a weekly dispatch from our international correspondents Get a weekly international news dispatch Email * SIGN UP I would like to be emailed about offers,