Complex sentence: By 1966, "Ready Steady Go!" had stopped being broadcast, mod was in decline, and the Who found themselves in competition with were groups including Cream and the Jimi Hendrix Experience on the London gigging circuit.
Split into simpler sentences: By 1966, "Ready Steady Go!" had stopped being broadcast, and mod was no longer as popular. The Who found themselves in competition with Cream and the Jimi Hendrix Experience on the London gigging circuit.