London general

• Ian Visits - London events listing guide
• Knowledge of London
• Londonist - 'a website about London and everything that happens in it'; sign up for daily and/or weekly emails about things to do and a digest of articles on the site
• London Online
• London Boroughs 50th Anniversary - Political Almanac and Anniversary Gallery of archive images from 1965 to 2015
• London Remembers - 'aiming to capture all memorials in London'
• London Shh... - small historic houses
• The London Society - 'the voice for the future of London'
• Panorama of the Thames - project to create a panoramic record of London's riverside through the centuries
• Port of London Authority
• Secret London
• Sub-Urban - London's sewerage and drainage
• Dark Waters - about the Thames and London (from a 2008 RIBA exhibition); includes a downloadable PDF 'Dark Waters history of the Thames and its piers'
• The Underground Map - 'digging under the surface of London'
• London transport tracks map - covers the Underground, Overground, DLR, Tramlink and National Rail; view online or download

Blogs

• Another Nickel in the Machine - '20th-century London, its history, its culture and its music'
• Diamond Geezer - 'life viewed from London E3'
• Edith's Streets - London local history
• Exploring London
• Georgian Gentleman
• The Great Wen
• Guildhall Library
• Know Your London - history of Inner London
• London by Gaslight - 'eclectic musings on Victorian Britain'
• London buses one route at a time, and now London's museums
• London Details - 'details you did not know about London'
• The London Grill - London Radio Taxis blog
• London Historians
• A London Inheritance - 'A Private History of a Public City'
• London My London
• Londoneer
• The Londonphile
• The Lost Byway - 'perambulations around London (..and beyond)'
• The Lost City of London - before the Great Fire of 1666
• Miss B Takes A Walk
• Mapping London
• London Mudlark (Facebook page)
• Mudlarking on the Thames, London
• Museum of London
• On Books, Streets & Migrant Footprints
• The Police Magistrate - 'tales from the Police courts of the metropolis'
• The Port of London Study Group
• Tales of London - 'The Adventures of a Tourist in Their Hometown'
• The Thames Admirer - London's past, Thames foreshore archaeology and history
• The Victorianist
• Walking London one postcode at a time

Books
(op) = out of print

• Peter Ackroyd, London Under (Vintage, paperback, 2012)
• Peter Ackroyd, Thames: Sacred River (Vintage, paperback, 2008)
• Rob Baker, Beautiful Idiots and Brilliant Lunatics (Amberley Publishing, 2015)
• Nicholas Barton, The Lost Rivers of London (Historical Publications, 1992)
• Tom Bolton, London's Lost Rivers: A Walker's Guide (Strange Attractor Press, 2011)
• Tom Bolton, Vanished City: London's Lost Neighbourhoods (Strange Attractor Press, 2014)
• Joe Brown, London Railway Atlas (Ian Allan Publishing, 4th revised edition, 2015)
• Angelo Hornak, London from the Thames (Little, Brown, 1999)
• Lee Jackson, Dirty Old London: The Victorian Fight Against Filth (Yale University Press, 2014)
• David Lawrence (ed), Omnibus: A Social History of the London Bus (London Transport Museum, 2014)
• David Long, Tunnels, Towers & Temples: London's 100 Strangest Places (Sutton Publishing, 2007)
• Mark Mason, Walk the Lines: The London Underground, Overground (Arrow, 2013)
• Ian Nairn, Nairn's London (Penguin Classics, 2014)
• John Richardson, The Annals of London: A Year By Year Record of a Thousand Years of History (W&N, 2000)
• Chris Roberts, Cross River Traffic - photographic project on London's bridges, available for Kindle
• Steve Roud, London Lore: The Legends and Traditions of the World's Most Vibrant City (Random House, 2008)
• Fiona Rule, London's Docklands: A History of the Lost Quarter (Ian Allan Publishing, 2009)
• Julian Schuckburgh, London Revealed (getmapping, 2003)
• Jo Swinnerton, The London Companion (Robson Books, 2004)
• Paul Talling, London's Lost Rivers (Random House, 2011)
• Adrian Warren and Dae Sasitorn, Discover the Thames from Above (Discovery Guides, Myriad Books, 2009)

Fiction set in London

• Ben Aaronovitch, Rivers of London, Moon Over Soho, Whispers Under Ground, Broken Homes, Foxglove Summer - entertaining series featuring Peter Grant, police constable and apprentice wizard
• Peter Ackroyd, The Clerkenwell Tales, Dan Leno and the Limehouse Golem, Hawksmoor, The House of Doctor Dee, The Great Fire of London
• Josephine Bell, The Port of London Murders
• Anthony Burgess, A Dead Man in Deptford - about Christopher Marlowe
• Christopher Fowler, series of books featuring detectives Bryant and May of the Peculiar Crimes Unit
• Hilary Mantel, Wolf Hall, Bring Up the Bodies - about Thomas Cromwell
• Andrew Martin, The Necropolis Railway
• CJ Sansom, Dissolution, Dark Fire, Sovereign, Revelation, Heartstone, Lamentation - series featuring lawyer Matthew Shardlake, set in the reign of Henry VIII