Three changes to the boundaries of Langbourn took place in 2013; all of the southern side of Lombard Street, with the notable exception of the guild - or ward - church of St Mary Woolnoth, is in Candlewick (from 2003 to 2013 Candlewick extended only to Abchurch Lane); the ward of Walbrook now includes the northern side of Lombard Street from number 68 to Bank junction.

"Langborne water so called of the length thereof, was a greate streame of water breaking out of the ground, in Fan Church streete [Fenchurch St], which ran downe with a swift course, west, through that streete, thwart Grastreet [Gracechurch Street] and downe Lombardestreete [Lombard Street], to the west ende of S. Mary Woolnothes Church, and then turning the course South downe Shareborne lane [Sherbourne Lane], so termed of sharing or deviding, it brake into divers rilles or rillets to the River of Thames, of this Bourne that warde tooke the name, and is till this day called Langborne warde, this Bourne also is long since stopped up at the heade and the rest of the course filled up and paved over, so that no signe thereof remaineth more then the names aforesaide.

"The John Stowe's 1598 Survey of London records the street name Sharebourne Lane and attributes its origin to the dividing of the stream at this point.

Henry Harben's 1918 Dictionary of London[8] asserts that Stowe's explanation "must be left out of account as a possible derivation, inasmuch as it ignores the earliest forms of the name to be found."

It goes on to list "Shitteborwelane," "Shiteburn lane," "Shiteb(ur)uelane" and "Shiteburlane as forms of the name recorded around 1300 AD.