The sequence of house numbers in Upper Gower Street proceeded on the east side from south to north, up to no.

In March 1837, Giuseppe Mazzini (Italian politician, journalist and activist for the unification of Italy) moved to 187 North Gower Street (at the time, 9 George Street, and now used for the filming of Sherlock) together with Italian poet and patriot Giovanni Ruffini, his brother Agostino Ruffini and Angelo Usiglio, living there for three years until 1840.

[4] As their daughter Etty later recalled, "He used to laugh over the ugliness of their house in Gower St, and the furniture in the drawing-room, which he said combined all the colours of the macaw in hideous discord",[5] and Darwin had christened the house "Macaw Cottage" in "allusion to the gaudy colours of the walls and furniture.

The long thin garden which backed onto Gower Mews North (later Malet Place) was incorporated into Foster Court car park in 1978.

[7] The etymologist and philologist Hensleigh Wedgwood, who was Charles Darwin's cousin and brother-in-law, lived at 94 Gower Street; he died there in 1891.

[8] From 1869 to 1892, 102 Gower Street was the home of the barrister William Belt who was best known for his erratic behaviour in later life which was widely reported by popular newspapapers for the amusement of their readers.

On the wall of the University College building, an elaborate wall plaque carries the legend: "Close to this place Richard Trevithick (Born 1771 - Died 1833) Pioneer of High Pressure Steam ran in the year 1808 the first steam locomotive to draw passengers."

The building was later re-numbered 147 Gower Street; the site was occupied from 2005 by the Accident and Emergency department of University College Hospital.

[citation needed] Millicent Fawcett, a leading figure in the constitutional wing of the British women's suffrage movement, lived at No.

[citation needed] From 1976 until 1995 the headquarters of MI5 was an anonymous grey office block at 140 Gower Street, adjacent to Euston Road.

The location is instantly recognisable by the adjacent Speedy's cafe and sandwich shop which is also shown in most external shots in the series.

The blue plaque for former resident Giuseppe Mazzini, clearly visible on Google Street View, is covered by a fake lamp for filming.