Every time I go to London, be it for the Theatre or just to shop, Pasta Brown is always my first stop. 
History
The History of "Farmer Brown Ltd" aka Pasta Brown:
1958: Harry Brown opened the first sandwich bar bearing the name Farmer Brown.
1963: Harry and son Paul open Farmer Brown sandwich bar in Carnaby Street.
1972: Harry and his 2 sons Paul & Mark open Farmer Brown sandwich bar in Great Portland Street.
1976: The Brown family enter Covent Garden for the first time, opening Farmer Brown sandwich bar in New Row, where it still stands today.
1979: Bedford Street was opened as a sandwich bar under the name ‘Cordon Brown’ (as in cordon bleu).
1994: Bedford Street; Pasta Brown was born, we felt pasta was the next step, we have been eating pasta all our lives and felt there wasn’t really anywhere in the area that served good pasta.
1999: Pasta Brown; Bow Street opened in November, it was the first new premises bought in 20 years. Situated just opposite the Royal Opera house and deep in the heart of Theatre Land.
2009: Pasta Brown launch their new website www.pastabrown.com profiling the newly refurbished premises in Bedford Street and Bow Street.