A PAT test, or Portable Appliance Testing, is a process of examining electrical appliances for safety through a combination of visual inspection and electronic testing. It's important for maintaining electrical safety in the UK to ensure appliances are free from defects and won't cause electric shocks, fires, or other harm. While not legally mandated by name, PAT testing is a widely recognized and practical way to comply with UK electrical safety laws and the legal duty to keep electrical equipment in safe working order.