Which two British pop music groups gained popularity during the Swinging Sixties?

The 1960s were a revolutionary time for music worldwide, and Britain was at the heart of it all. This era, often called the "Swinging Sixties," saw a massive explosion of British talent onto the global stage, forever changing popular music. The Rolling Stones and The Beatles were arguably the two biggest bands to emerge from this scene. The Beatles, with their catchy melodies and innovative studio techniques, became a global phenomenon almost overnight. Their impact on fashion, culture, and music is still felt today. Similarly, The Rolling Stones, with their blues-influenced rock and rebellious image, offered a different but equally compelling sound. They became known for their energetic live performances and enduring hits. ABBA, while hugely successful, emerged in the 1970s, while Radiohead is a much more recent band, forming in the late 1980s. So, when you think of the British Invasion and the bands that defined the Swinging Sixties, The Beatles and The Rolling Stones are the quintessential examples.
Think of a pair of British bands from the '60s that 'rolled' out hits like clockwork and 'beat' everyone else on the charts.