On 23 November 2006 Russian dissident, Alexander Litvinenko, died at University College Hospital. His death was attributed to poisoning with radioactive polonium-210. The Russian government were suspected of his murder.

On 23 November 1896 Woolwich Arsenal’s Joe Powell broke his wrist in a league match, he died 6 days later from tetanus complications

It was at Francis Bacon’s studio at Narrow Street, Limehouse that he met lover George Dyer as Dyer attempted to burgle the place

The dome of the O₂ weighs less than the air contained underneath it; there’s only one curved piece of glass in the Gherkin – the one right at the top

In 1862, Dr Thomas Orton, one of London’s most senior physicians, established four sibling’s deaths in Limehouse were caused by vivid green wallpaper whose constituent was arsenic

Under Paddington Green is a disused Cold War command centre its entrance covered by a bush, nearby are the top-security jail cells for terrorist suspects inside London’s Paddington Green Police Station

A fight with a fashion designer at a party is said to have inspired Ray Davis to write The Kinks hit Dedicated Follower of Fashion

During World War II the south moat at the Tower of London was used by the Yeoman Warders as allotments to grow vegetables

The neon sign on Hornsey Road Baths is the sole survivor of 12 similar signs commissioned at various London baths in the 1930s

The eastern extension of the Jubilee line is the only Underground line to feature glass screens to deter ’jumpers’

Constructed in 1850 Crystal Palace had nearly 1 million square feet of glass, about a third of all the glass produced in England that year

The Clapham South wartime bomb shelter was later used to house the first ever Jamaican immigrants who arrived in 1948 on the Empire Windrush

Trivial Matter: London in 140 characters is taken from the daily Twitter feed @cabbieblog.
A guide to the symbols used here and source material can be found on the Trivial Matter page.