Delhi Assembly's mysterious chamber really a phansi ghar for executions?

The previous Aam Aadmi Party government in Delhi claimed that two underground chambers and a tunnel beneath the Assembly building were British-era gallows, possibly connected to the Red Fort. The BJP junked AAP's claims that the chamber was a 'phansi ghar' and called out its spend of Rs 1 crore to turn it into an exhibit. This is what historians and archaeologists have to say about the mysterious chamber.

Delhi Assembly's mysterious chamber really a phansi ghar for executions?
The previous Aam Aadmi Party government in Delhi claimed that two underground chambers and a tunnel beneath the Assembly building were British-era gallows, possibly connected to the Red Fort. The BJP junked AAP's claims that the chamber was a 'phansi ghar' and called out its spend of Rs 1 crore to turn it into an exhibit. This is what historians and archaeologists have to say about the mysterious chamber.