Z Cars was a British tv police drama set in Liverpool. It started in the 1960s and run into the 1970s. The theme tune was from a piece called the 'Lost Patrol.' I used to remember this sound very vividly as a kid when Z Cars came on television. It is another of those tunes that takes me back to my Retro Brit childhood.
The tune is often heard at Everton football club when they are playing at home.