The Officiate Website of Iranian Institute for Contemporary Historical Studies (مؤسسۀ مطالعات تاریخ معاصر ایران) should be consulted. In particular, this article, in Persian, by Dr Farzad Jahān'bin, is worth considering. The idea being advanced is that whereas the taking of Bast of between some 12,000 to 14,000 men in the British Legation in Tehran seems to have been spontaneous, preparations for hosting such large numbers (providing for both meals and sanitation of the individuals taking the Bast) had been in the making for months in advance. There are eye-witness reports indicating how months in advance of the event, the British middlemen had been purchasing large quantities of rice and other foodstuff in various food markets in and around Tehran and transported these at night-times into the complex housing the British Legation in Tehran.
The orthodox viewpoint in contemporary Iran (consult Iranian Institute for Contemporary Historical Studies) is that the word Mashrouteh (مشروطه), in opposition to Mashrou'eh (مشروعه) (meaning, based on religion or based on religious traditions), was insinuated and popularised by the British. According to Dehkhoda Dictionary (3rd edition, Tehran University Press, 2006), Mashrouteh is a form of state government according to which introduction and elimination of laws are the sole prerogatives of Parliament, or Houses of Parliament. In this connection, Sheikh Fazlollah Noori insisted on a Mashrou'eh form of government, according to which the sole role of Majles would be the safeguarding of the Islamic laws.
Sang-e-laj (سَنگِلَج) is one of the neighbourhoods of the Old Tehran, not far from the Grand Bazar of Tehran. The Sang-e-laj Theatre, one of the oldest theatre halls in Iran, which is still in use, is located in this neighbourhood. For further information, consult the entry Sang-e-laj in The Persian Wikipedia.