The modern Dragon's Den pitches filmed at MediaCityUK are filmed in Salford.
MediaCityUK is a major media complex at Salford Quays in Greater Manchester. It became an important production location for BBC programmes after the corporation moved substantial operations from London to the North West. Dragon's Den is associated with this modern production era, which is why Salford is the precise city answer.
Manchester is the broader metropolitan area and is therefore a plausible but less specific response. MediaCityUK is not in the City of Manchester itself; it is in Salford, across the River Irwell from central Manchester. That geographic distinction is frequently blurred in casual descriptions of the location.
The move reflects the BBC's wider regional strategy and the growth of Salford Quays as a broadcasting, digital and creative-industries hub. The location should not be confused with the places where earlier series were produced.