Sam Fender and Olivia Dean have made UK chart history. Their collaborative single, "Rein Me In," has become the longest-running No. 1 in the country's Official Singles chart history. The song has spent 19 non-consecutive weeks at the top, breaking a record that had stood for 73 years. The previous holder was Frankie Laine's "I Believe," which set the mark in the early 1950s. The achievement places Fender and Dean above some of the biggest names in British music, cementing the duet's place in the record books. The track's steady climb and sustained popularity have kept it at No. 1 across multiple chart periods, allowing it to outlast the longstanding record. Fans and industry observers have celebrated the milestone, marking a significant moment for both artists.