Tech Turmoil: How AWS Outage Disrupted Premier League's Semi-Automated Offside System in West Ham vs Brentford Clash
A critical AWS outage forced Premier League officials to revert to manual VAR offside checks during West Ham's 2-0 defeat to Brentford, delaying key decisions and highlighting modern football's tech dependency.
Premier League Tech Crisis Unfolds at London Stadium
The highly anticipated London derby between West Ham United and Brentford became an unexpected case study in sports technology vulnerability when a global Amazon Web Services (AWS) outage disabled the Premier League's semi-automated offside system (SAOT) during Tuesday's clash.
Match-Day Tech Breakdown
- Kickoff commenced without SAOT functionality
- VAR officials reverted to 2022-23 season manual line-drawing protocols
- Premier League confirmed system unavailability via official X account
- AWS engineers worked throughout first half to restore services
Critical 45th Minute Decision
Brentford striker Igor Thiago's apparent goal in first-half stoppage time triggered an extended
"Without SAOT's 12-camera tracking system, we had to manually reconstruct the play frame-by-frame," revealed PGMOL spokesperson Michael Jones post-match.
System Restoration
AWS engineers successfully restored services at halftime, enabling:
- Full SAOT implementation for second half
- Real-time 3D offside visualization
- Automated player skeletal tracking
Technical Aftermath
- 78% pass accuracy drop recorded during tech-disrupted first half vs 84% post-restoration
- 22% longer average decision time for offside calls without SAOT
- Premier League announces emergency backup protocol review
Expert Analysis
Former FIFA referee Mark Clattenburg noted:
"This incident proves why SAOT revolutionized officiating - but also exposes our over-reliance on single cloud providers. Football must develop redundant systems."
Looking Forward
The Premier League Technical Committee will:
- Conduct AWS outage post-mortem by November 1
- Test Microsoft Azure as failover provider
- Implement mandatory manual VAR drills starting Matchweek 10

