Transport for London begins new trial https://www.railadvent.co.uk/2026/09/transport-for-london-begins-new-trial.html #BritishTransportPolice #FinsburyPark #london #northumberland #NorthumberlandPark #OxfordCircus #TottenhamHale #TransportForLondon #vauxhall #VictoriaLine #walthamstow #working