post offices and postboxes. Seventeen explosions had occurred within two hours. 24 June – In London, several bombs exploded following or preceding a demonstration (under police protection) in honour of Wolfe Tone. The banners the marchers carried demanded the release of IRA members who had been arrested by the British police. 24 June – London branches of the Midland Bank, Westminster Bank and Lloyds Bank were targeted with a series of massive explosions. London police carried out mass arrests; interrogations of the Irish community in Britain with the majority being released soon after. Sir Samuel Hoare, introduced the Prevention of Violence Bill (Temporary Provisions). The bill provided comprehensive powers for the British government to prevent the immigration of foreigners, for their deportation, and for extending to the Irish the requirement to register with the British police. Hoare referred to the S-Plan of the IRA when presenting the bill to the British parliament. He also stated that a total of 127 attacks had been perpetrated since January 1939, 57 in London and 70 in the provinces. In the course of these one person had been killed and 55 seriously or less seriously injured. 66 persons had been convicted of "terrorist activity". In all, Hoare repeated that the British police had seized; 55 sticks of gelignite, 1,000 detonators, 2 tons of potassium chlorate & oxide of iron, 7 gallons of sulphuric acid and 4 cwt of aluminum powder. Hoare explained that up to the present the perpetrators of these attacks had restricted themselves to damaging British property, however recently the government had been notified that the campaign was about to intensify with no regard being paid to human life. He added that the IRA campaign "was being closely watched and actively stimulated by foreign organisations" (a reference to German Intelligence). Hoare went on to claim that the IRA had come within an inch of blowing up Hammersmith Bridge, Southwark Power Station, and an aqueduct in North London. They had collected detailed information about important bridges, railway lines, munition dumps, war factories and airfields and even engaged in a plan to blow up the Houses of Parliament. July In July 1939 the IRA started bombing railway stations. Bombs were left in waiting rooms and luggage rooms overnight. 3 July – Seven bombs went off in railway stations the Midlands. Nottingham, Leicester, Warwick, Derby, Birmingham, Coventry and Stafford were bombed. Nobody was seriously injured.