When British made shows are set in London, but filmed elsewhere.

This can be due to cost, or lack of the right sort of architecture (much of the Victorian architecture in the East End was destroyed in the Second World War or subsequent slum clearance).

Despite what the name would suggest [[AccentDepundent to those with a certain accent]], the city used is usually (but not always) somewhere in the UK - productions rarely, if ever, actually use Dublin for London.

Compare CaliforniaDoubling.
!Cities that have doubled for London:
* Bucharest (The 2005 MadeForTVMovie version of ''SweeneyTodd'', although this used an outdoor set on a studio backlot rather than locations in the city itself.)
* Cardiff (''Series/DoctorWho'' and its spinoff ''Series/TheSarahJaneAdventures'') [[note]]Ironically, one episode actually set in Cardiff, ''The Unquiet Dead'', had to be filmed in Swansea as the architecture was too modern to pass for Victorian era buildings.[[/note]]
** ''Series/{{Sherlock}}'' is also filmed in Cardiff.
* [[UsefulNotes/FootballPopMusicAndFlatCaps Liverpool]] (''The Ruby in the Smoke'')
* [[UsefulNotes/FootballPopMusicAndFlatCaps Manchester]] (''Series/PrimeSuspect'', ''Series/RedDwarf'', ''Film/SherlockHolmes'')
* Prague (''Film/FromHell'', again using backlot sets rather than city streets.)
** The London parts of ''Film/PrinceCaspian'' were shot in Prague too.
* Shrewsbury (''Film/AChristmasCarol1984'')
** Scrooge's headstone can still be visited in the graveyard of St Chad's Church.
* Berlin (''Around the World in Eighty Days'', 2004)
* Despite the pun above UsefulNotes/{{Dublin}} ''has'' doubled for London in ''Series/TheTudors'', ''Series/{{Primeval}}'', ''Series/RipperStreet'' and the later seasons of ''Series/FoylesWar''
* Brisbane, Australia (''Series/{{K9}}'')
* Vilnius, Lithuania (''Series/ThePalace'').
* Riga, Latvia (''Series/TheAdventuresOfSherlockHolmesAndDoctorWatson'')
* Hamburg, in the ''Film/EdgarWallaceFilms''.
* ''WebVideo/AshensAndTheQuestForTheGameChild'' inverts this: London doubles for Norwich.
* ''Theatre/{{Equus}}'' was filmed in Toronto, as was ''Film/{{Jumper}}''
* UsefulNotes/LosAngeles, [[CaliforniaDoubling of course]], in productions ranging from ''Film/MrsMiniver'' to ''Film/AustinPowers'' (which hung the world's biggest [[LampshadeHanging lampshade]] on it).