Anniversaries in August
- 1 August
- 1820 – The eastern section of the Regent's Canal opens between Limehouse Basin and Hamsptead Road Locks at Camden.
- 1831 – Designed by John Rennie the Elder and built by John Rennie the Younger, "New" London Bridge over the River Thames opens.
- 1865 – London, Chatham and Dover Railway opens branch from Nunhead to Crystal Palace & Upper Norwood.
- 2 August
- 1880 – Metropolitan Railway extends from West Hampstead to Harrow-on-the-Hill.
- 1967 – Second bore of Blackwall Tunnel opens under the River Thames between Blackwall and the Greenwich Peninsula.
- 3 August
- 1920 – Central London Railway extends from Wood Lane to Ealing Broadway.
- 1926 – The first electric traffic light in Britain is installed at Piccadilly Circus. It was manually operated by a police officer.
- 1963 – Erection of the Umbrella road deck over Oxford Circus begins to allow the excavation for the new station concourse below the junction.
- 4 August
- 1902 – Greenwich foot tunnel opens under the River Thames between Greenwich and the Isle of Dogs.
- 5 August
- 1906 – Baker Street and Waterloo Railway extends from Lambeth North to Elephant & Castle.
- 6 August
- 1844 – Birth of James Henry Greathead, designer of the Greathead tunnelling shield and engineer of the City and South London Railway.
- 7 August
- 1838 – A guard is killed on a London and Birmingham Railway train near Harrow & Wealdstone after he slips when crossing between carriages and his legs are crushed under the wheels.
- 8 August
- 1874 – Birth of Albert Stanley, Chairman of the UERL and the London Passenger Transport Board.
- 1898 – Waterloo and City Railway opens between Waterloo and Bank.
- 9 August
- 1972 – Government announces its choice of the particular site at Maplin Sands, Essex for London's third airport.
- 10 August
- 1885 – Woodside and South Croydon Joint Railway opens between Woodside and Selsdon.
- 11 August
- 1797 – Birth of George Shillibeer, bus operator.
- 1854 – Metropolitan Railway granted powers to construct railway between Paddington and Farringdon.
- 12 August
- 1828 – The Kensington Canal opens between Kensington Basin, Warwick Road and the River Thames near Battersea Bridge.
- 13 August
- 1979 – British Airports Authority makes an agreement with West Sussex County Council that no second runway will be constructed at Gatwick Airport for forty years.
- 14 August
- There are no anniversaries today
- 15 August
- There are no anniversaries today
- 16 August
- 1976 – Northern City Line re-opens between Old Street and Drayton Park with British Rail services replacing those of the Northern line's Highbury Branch.
- 17 August
- There are no anniversaries today
- 18 August
- 1924 – Charing Cross, Euston and Hampstead Railway extends from Hendon Central to Edgware.
- 1976 – North Circular Road flyover at Staples Corner opens.
- 19 August
- There are no anniversaries today
- 20 August
- 1989 – A collision between pleasure boat Marchioness and dredger Bowbelle causes the former to sink near Cannon Street railway bridge with 51 passengers killed.
- 2016 – All-night Night Tube services begin on a number of London Underground lines.
- 21 August
- 1850 – A shunting accident at Bricklayers Arms station causes the collapse of the roof killing a porter.
- 1866 – Death of George Shillibeer, bus operator.
- 1961 – First section of Clearway introduced in London runs five miles along the A4 from Knightsbridge to Chiswick Flyover, stopping parking between 8 am and 9.30 am.
- 22 August
- 1848 – London and South Western Railway opens line from Richmond to Datchet.
- 1849 – London and South Western Railway opens line from Barnes to a temporary station near Isleworth.
- 1867 – Edgware, Highgate and London Railway opens between Finsbury Park and Edgware.
- 23 August
- 1873 – Albert Bridge over the River Thames opens.
- 24 August
- There are no anniversaries today
- 25 August
- 1862 – London, Chatham and Dover Railway opens its terminus at Victoria adjacent to the London and Brighton Railway's terminus. Its line runs to Herne Hill.
- 1919 – Operated by Aircraft Transport and Travel, the world's first daily international flight leaves Hounslow Heath Aerodrome for Le Bourget, Paris.
- 26 August
- 1916 – A passenger is killed at City Road station when the guard signalled for a train to depart before all of the passengers had alighted.
- 27 August
- There are no anniversaries today
- 28 August
- 1937 – Morden-Edgware line is renamed Northern line.
- 1937 – Central London line is renamed Central line.
- 29 August
- There are no anniversaries today
- 30 August
- There are no anniversaries today
- 31 August
- 1846 – The horse-drawn Surrey Iron Railway closes.
- 1908 – Death of Leslie Green, architect of UERL stations.
- 1987 – Docklands Light Railway opens between Island Gardens and Tower Gateway or Stratford.
- 2011 – Docklands Light Railway extends from Canning Town to Stratford International.
