Tea drinking is nothing new, the habit goes way back to Asian culture. Afternoon tea however, was introduced in England by Anna, the seventh Duchess of Bedford, in the year 1840.  The Duchess would become hungry around four o’clock in the afternoon because the evening meal in her household was served fashionably late at eight o’clock.  For full article https://www.historic-uk.com/CultureUK/Afternoon-Tea/.