In the early years of the 20th century, the North London Line suffered a reduction in passengers and, especially, revenue, owing to the expansion of the bus, tram and Underground networks. In 1909, the NLR passed general handing of trains to the LNWR. By 1913, numbers had dropped to 44.6 per cent compared to 1900, and by 1921 to only 23.3 percent and the patronage of Broad Street station declined accordingly. On 8 September 1915, the station was damaged by a Zeppelin attack.