Services at London Waterloo are disrupted after reports of “smoke on the tracks,” South Western Railway (SWR) says. The operator tells passengers that some trains are being forced to run slower than usual while a safety inspection is carried out. Both outlets report that the disruption is linked to the precautionary checks following the smoke alert, rather than a specific equipment failure disclosed publicly. The delays affect a portion of SWR’s services at the major London station, with reduced speeds in place during the inspection process. An SWR warning is issued to passengers as the checks continue, advising them to expect disruption and to allow extra time for journeys. The reports describe the incident as an operational safety response that results in slower running for trains serving Waterloo, pending completion of the inspection.