Premier League clubs are drafting in teams of officers to search for paedophiles who may use matches to groom victims.
A number of clubs, including Manchester United, have officials dotted around their stadiums on matchdays watching for suspicious activity.
Each top-flight club is required to appoint a safeguarding officer and train stewards to look out for signs that point towards children or vulnerable adults being taken advantage of. Some, including United, have gone further.
United have a safety management team and introduced a 'matchday safeguarding operation' whereby officers 'take up strategic positions to monitor activity'.
A document seen by Sportsmail says United's safeguarding officers have had 'multi-agency training to identify issues around differing groups of vulnerable people - including children who may be subject to neglect, child sexual exploitation and domestic abuse'.