John Russell Parnell was born in London on August 6, 1923 into a theatrical family.



Jack Parnell began learning the piano at age five and the drums at eight. When he was ten years old his father took him to the first British appearance of Duke Ellington’s orchestra, which determined him on a musical career.



Jack Parnell’s first job was in the office of agent Leslie MacDonnell, but soon he was on his way to being a professional musician, helped by one of the dance band drummers he had witnessed, wide-eyed in the wings: "I had half a dozen drum lessons from Max Abrams, who was a very fine teacher, as well as being the drummer in Carroll Gibbons’ band."



Jack Pareell took his first professional engagement at 16, with a concert party at the Futurist Theatre, Scarborough, left to join the Sammy Ash Band at the Rex Ballroom, Cambridge, and joined the RAF in 1940.



Jack Parnell played throughout the war in bands attached to Bomber Command, including in a sextet led by the saxophonist Buddy Featherstonhaugh which also featured the trumpeter Kenny Baker. In 1944, Parnell teamed up with the guitarist Vic Lewis to form the Lewis-Parnell Jazzmen, which quickly became a popular recording band.



Jack Parnell's ambition to play in a big band was achieved in the summer of 1945, when he joined the newly-formed Ted Heath and his Music. Heath’s intention had been to lead a “sweet” band playing music from the pre-war era, but the corps of young musicians he had hired, including Parnell and Baker, persuaded him to adopt a more jazz-flavoured style. As well as playing drums, Parnell took over the job of singing the swing and novelty numbers and soon became one of the band’s main attractions. Jack Parnell appears in the 1946 film London Town, performing what is almost an early form of rap music with a piece entitled The 'Ampstead Way.



Jack Parnell’s family connections were instrumental in establishing Heath’s regular Sunday “Swing Sessions” at the London Palladium, which began in December 1945 and continued well into the 1950s.



In 1951, Jack Parnell left Heath and formed his own band. Its first engagement was playing for the West End show Fancy Free, staged by Val Parnell and starring Tommy Trinder and Pat Kirkwood. This required him to conduct, something he had never done. He turned for help to George Malcolm, conductor and harpsichordist, whom he had known since Bomber Command days. Malcolm helped him out in this predicament and went onto provide him with a thorough grounding in the conductor’s art.



When Fancy Free closed, Jack Parnell and his Orchestra went on tour. The impresario Leslie Grade, (Lew’s brother and a family friend), offered Parnell advice: “You can’t lead a band sitting down at the drums, Jack. You’re the star, so you’ll have to stand up in front. And the show must have a high-spot, something to make the audience sit up and take notice.” Parnell hit upon the idea of a synchronised drum duet with the band’s drummer, Phil Seamen. “It wasn’t anything like as difficult as it seemed,” he admitted in later years, “but it looked terrific and very clever. That’s when I finally realised that most of the public listen with their eyes. The band had been losing money, but the duet saved us. It caused a sensation and made our name.”



With the advent of rock and roll, the fortunes of the big bands declined. Jack Parnell accepted the job of musical director at ATV in 1956, a post he was to hold for 26 years. The company’s flagship show, Sunday Night At The London Palladium, was broadcast live for most of its run, with rehearsals during the day. The tension as transmission time approached was enormous, but Parnell always maintained that shows produced under these stressful conditions came over better than the later, pre-recorded ones.



Disasters were sometimes only narrowly avoided, as when the orchestra, accompanying Placido Domingo in a rehearsal of excerpts from Pagliacci, turned the page and found itself playing a soft-shoe shuffle. The library had sent along Harry Secombe’s music by mistake.



In all, Jack Parnell conducted more than 2,500 shows for ATV and worked with virtually every top entertainer of the period. His work on the Barbra Streisand Special gained him an Emmy Award in 1973. He also won both the Harriet Cohen and Ivor Novello Awards during his ATV career.



In 1983, having completed the final Muppet Show, Jack Parnell retired from ATV. He had not touched the drums for 16 years and was looking forward to resuming his old trade. He took delivery of a superb new kit, but found that he could barely play. Lack of practice had caused his drumming muscles to lose all their tone and he was obliged to rebuild his technique from scratch. Nevertheless, he eventually returned to full-time playing at the highest level. Throughout the 1990s Jack Parnell toured with the show Best of British Jazz, alongside his old colleague Kenny Baker; was an occasional member of the posthumous Ted Heath orchestra; and played for a host of visiting American jazz stars.



On reaching the age of 80, Jack Parnell declared that he had retired. In the next breath he listed the activities with which he intended to avoid boredom in his retirement. These included drumming at weekly jazz club sessions near his home in Suffolk and conducting recording orchestras for his friends, the composers Robert Farnon and Laurie Johnson. In his spare time he played Bach on the piano.



Jack Parnell died on Sunday August 8, 2010 after losing his fight with cancer. He was 87.