New Research Shows That Britain Has a Hidden Informal Lending EconomyMore than half of UK adults (54%) have lent or borrowed money from friends or family in the past year, new research from Pebblio reveals, exposing the scale of Britain’s hidden informal lending economy. Most informal loans still rely on verbal promises or personal trust, only a small minority has any written record, which often leads to confusion and strain in relationships. “Lending money to people you love and care about should never turn into a source of anxiety or conflict. The bank of mum and dad - and friendsBritain's informal lending market is substantial and largely invisible. Nearly half of recent informal loans (47.6%) were for £250 or more.