What led Siraj to attack the British in Calcutta?

What led Siraj to attack the British in Calcutta? Name one contemporary influential person in Bengal. Why did the British decide to overthrow Siraj?

a. Enemy of Siraj:

Of the numbers of the family Siraj’s diehard enemy was his aunt Ghasiti Begum.

b. Siraj Attacks Calcutta:

From the very beginning Siraj was not favourably disposed towards the English.

This was due to a variety of causes. But the most important was the shelter given by the English to Krishnadas who was the representative of Ghasiti Begum.

The English refused to obey the Nawab’s order to handover Krishnadas.

Also Siraj came to know that the English had undertaken the repair work of the Calcutta fort disobeying the order of the Nawab.

All this led Siraj to march towards the English settlement at Calcutta in early 1757.

c. Influential Person:

Jagat Seth, the banker of Bengal’s Nawab was one of the most influential persons in Bengal.

d. Hostility of the British:

The relation between the Nawab Siraj of Bengal and the British was not at all cordial from the very beginning.

Particularly, after Siraj’s attack upon Calcutta the British were convinced that no understanding was possible with Siraj.

And they thought that in order to smoothen the trade and commerce a friendly Nawab would be of much help.

Meanwhile when some influential persons of Bengal also expressed their displeasure with the Nawab, the British finally decided to remove Siraj from the post of Nawab of Bengal.