The UK television show Dragon's Den is filmed at Roath Lock Studios in Cardiff, Wales.
Roath Lock is a BBC Cymru Wales production facility in Cardiff Bay. The complex opened in 2011 and became a major base for television production in Wales. Dragon's Den has been among the programmes filmed there, alongside other BBC productions.
Cardiff is the capital of Wales and a significant centre for British television production. Naming the city is more precise than simply saying Wales, because Roath Lock Studios is a specific Cardiff facility. Swansea and Newport are also Welsh cities but are not the location identified by the studio reference.
The filming location should not be confused with the entrepreneurs' business locations. Contestants come from across the United Kingdom and pitch ideas from many sectors. The studio provides the set for the televised meeting, while investment due diligence and later business activity can take place elsewhere.