India, June 10 -- Saayoni Ghosh, key leader of the Trinamool Congress (TMC) Jadavpur MP, is learnt to have joined the rebel camp - a development that will be the biggest jolt to former West Bengal chief minister Mamata Banerjee amid her struggle to keep her party intact after the state election loss.

Ghosh, who emerged as the most prominent voices against the Bharatiya Janata Party (BJP) and a staunch Mamata Banerjee support during the campaign for the recently concluded West Bengal elections, is yet to confirm the move, though people familiar with the matter told HT she may already have picked a side and is part of the rebel group in what is emerging as the All India Trinamool Congress's biggest crisis since its inception.

A former Ben...