England team venues will have to be swept for listening devices on a regular basis to maintain confidentiality, security experts said on Tuesday.
The Football Association have taken legal steps to ensure that bugged conversations between England players and coaches from two weeks ago remain under wraps.
SIASS, a private intelligence agency with offices in London, Newcastle and Chester, already carry out similar work for sports teams, companies and foreign governments and a spokesman told Press Association Sport: "If they don't already do so, then the people that run the security for England need to sweep for bugs."
The spokesman added: "They will have a risk-management strategy in place but they need really high-tech surveillance counter-measures. Any listening device can be picked up by a properly trained and experienced operator.
"We have worked for sports teams before and their sensitive information can be valuable both to opponents and to a scurrilous individual wanting to sell a scoop to the newspapers.
"There are a wide range of listening devices from long-range microphones to frequency-hopping transmission systems to digital devices - but these can all be detected."
Discussions involving England manager Fabio Capello and the squad are understood to have been secretly taped ahead of the recent friendly against Egypt.
Although they have not officially commented, the FA's lawyers have contacted media organisations warning that publication of the contents of the recording would be illegal and a breach of the Data Protection Act and Press Complaints Commission rules.
The secret recording is yet another unwelcome issue for Capello to be faced with in the build-up to the World Cup after the England coach was forced to replace John Terry as captain following revelations about the Chelsea defender's private life.
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