Calcutta, Oct. 1: Forward Bloc MLA Udayan Guha today joined the Trinamul Congress after meeting chief minister Mamata Banerjee at Calcutta airport.

"Udayan Guha has joined our party. He is an able organiser. He has been made a general secretary of Trinamul. He will contest from Dinhata (in the Assembly polls next year) and the party will use his organisational skills in north and south Bengal," Mamata said at the airport.

Last week, the MLA from Cooch Behar quit all party posts. Yesterday, he did not meet Bloc state secretary Ashok Ghosh despite a call from the veteran leader, strengthening speculation that he could join Trinamul.

Guha spent the better part of yesterday in the Assembly.

The Bloc MLA, who had been advocating a change in the leadership, had quit as the party's Cooch Behar district secretary and the party state secretariat member through a letter to the nonagenarian Ghosh.

It was learnt that Guha, who is a member of the North Bengal Development Council, was eyeing a better position in the body which is headed by the chief minister. North Bengal development minister Gautam Deb is its vice-chairman.

This evening, the Bloc expelled Guha, who is also the Dinhata municipality chairman, for anti-organisational activities.

Bloc state secretary Ghosh said: "Udayan Guha has been expelled from the party. He used to talk about morals and principles. If that be so, he should quit his MLA's post and relinquish the municipality chairman's office and face a fresh electoral test."

Asked about the Bloc's reaction, Guha said: "I won't quit as MLA as only seven months are left for next year's Assembly elections. As for the municipality chairman's office, I am ready to face a no-confidence motion against me."