Footballers 'have right to see where data goes'
Hundreds of footballers have threatened legal action against the data collection industry, which could change how information is handled.
Led by former Cardiff City, Leyton Orient and Yeovil Town manager Russell Slade, 850 players want compensation for the trading of their performance data over the past six years.
They also want an annual fee from the companies for any future use.
"Letters before action" have been sent to 17 big firms, alleging data misuse.