Trinamool Congress leader Babul Supriyo resigned as a Member of Parliament on Tuesday a month after he quit the Bharatiya Janata Party.

Supriyo, who was BJP’s MP from the Asansol constituency, submitted his resignation to Lok Sabha Speaker Om Birla.

“I shall always cherish the experience, enlightenment, knowledge and insight that I have earned as a parliamentarian from this august house & the ‘Temple of Democracy’ of the largest democracy in the world,” he said in a letter addressed to Birla.

Supriyo added that he will remain “indebted” to the BJP, Prime Minister Narendra Modi, Union Home Minister Amit Shah and party chief JP Nadda.

Earlier on Tuesday, Supriyo asked West Bengal Leader of Opposition Suvendu Adhikari to urge his father Sisir Adhikari to resign as an MP, as he was no longer a member of the Trinamool Congress, ANI reported.

Sisir Adhikari won the Kanthi Lok Sabha seat on a Trinamool Congress ticket in 2019, but switched to the BJP in March 2021.

Supriyo joined the Trinamool Congress in West Bengal on September 18. He had then announced that he would give up his Lok Sabha seat of Asansol.

He left the BJP after he was dropped as a Union minister from Narendra Modi’s Cabinet during a reshuffle in July. Before being dropped from the Cabinet, he was the Union Minister of State for Environment, Forests and Climate Change.

On July 31, Supriyo said that he had quit active politics, but two days later, he announced that he would continue to work as an MP.

“I meant it from my heart when I said I will leave politics,” the former Union minister said while joining the Trinamool Congress. “However, I felt there was a huge opportunity [joining Trinamool Congress] that was entrusted upon me. All my friends said my decision to leave politics was wrong and emotional.”