[swisstrains]

Are British diesel and electric locos fitted with smoke detectors and fire extinguishing systems?
I am asking this question as a result of an incident that occured in Switzerland during the "Gotthard 125" celebrations in September. A special passenger train laid on to shuttle enthusiasts between the two main exhibitions at Erstfeld and Biasca was being hauled by one of the modern Class 484 electric freight locos. As it was passing through one of the many tunnels on the Gotthard route it's fire detection/extinguishing system activated and the loco was shutdown. The train remained stranded, partly in the tunnel, until an older electric loco arrived to rescue it.
It appears that the Class 484's smoke detection system was activated by smoke lingering in the tunnel from two steam specials that had passed through earlier. The daily operating instructions warned against electric trains following the steam specials at less than 5 minutes headway but obviously this wasn't enough.
I was wondering if this could happen in the U.K. especially as steam specials on our mainlines are much more common than in Switzerland.