The 11 Championship clubs who have formally complained to the Football League about Leeds United's espionage ventures have demanded to be provided with the times and dates of Marcelo Bielsa's spying sessions.
The EFL and the FA are investigating after it emerged that Leeds had sent a spy to Derby's training ground the day before Frank Lampard's side lost 2-0 against Leeds at Elland Road. Bielsa has since revealed his staff have spied on every opponent this season.
In a formal letter sent to the EFL, the 11 clubs, including promotion rivals Norwich, Derby and Middlesbrough, have demanded all video footage by Bielsa's spies in addition to all scouting reports sent back from the premises.
The clubs have also asked the investigation to reveal the identity of every spy dispatched to training grounds, the fees they were paid and whether Leeds may have paid third parties for information about the inside workings of opponents.
Bielsa's spy at Derby was understood to be a 20-year-old Argentine intern.
Blackburn, Brentford, Bristol City, Hull, Millwall, Nottingham Forest, Preston and Swansea are the other clubs to co-sign the letter.
