According to the Docklands and East London Advertiser...
The ‘rapid response’ teams called out to tackle emergencies on the London Underground are getting ‘blue light’ priority and police drivers to get them through traffic.
A trial is being carried out with British Transport Police to halve response times, with TfL emergency vehicles being fitted with the same flashing blue lights used by police, fire and ambulance services.
About time too!
LUL's Emergency Repsonse Unit really is London's 4th Emergency Service.