Cape Town - England coach Eddie Jones has admitted that he used to spy on rival teams in the past.
Jones made the revelation in an interview with The Guardian but said he no longer employs the tactic.
Jones made the startling revelation in the wake of recent admissions from Leeds United football manager Marcelo Bielsa that he had spied on Championship rival clubs all season.
"Fifteen years ago, we used to send people out in costumes to watch training - it used to be part of the pre-match brief then," Jones said. "I can remember sending a coach who is now in a very senior position dressed like a swagman to watch one team train and he got chased out of there."
Jones however added: "You do not need to do it now because you see everything now in a game."
The England mentor is currently preparing his team for the upcoming Six Nations.
They will open their campaign against Ireland in Dublin on February 2.
Jones last week named a 35-man squad for their season-opener.
England 35-man training squad":
Chris Ashton (Sale), Mike Brown (Harlequins), Joe Cokanasiga (Bath), Elliot Daly (Wasps), Ollie Devoto (Exeter), Owen Farrell (Saracens, capt), George Ford (Leicester), Jonny May (Leicester), Jack Nowell (Exeter), Dan Robson (Wasps), Henry Slade (Exeter), Ben Te'o (Worcester), Ollie Thorley (Gloucester), Manu Tuilagi (Leicester), Ben Youngs (Leicester)
Jack Clifford (Harlequins), Dan Cole (Leicester), Luke Cowan-Dickie (Exeter), Tom Curry (Sale), Ben Earl (Saracens), Ellis Genge (Leicester), Jamie George (Saracens), Nathan Hughes (Wasps), Maro Itoje (Saracens), George Kruis (Saracens), Joe Launchbury (Wasps), Courtney Lawes (Northampton), Ben Moon (Exeter), Brad Shields (Wasps), Kyle Sinckler (Harlequins), Jack Singleton (Worcester), Billy Vunipola (Saracens), Mako Vunipola (Saracens), Harry Williams (Exeter), Mark Wilson (Newcastle)