Union leaders are poised to support the commissioning of new research on pensions as part of a campaign against longer working and cuts in payments.
The TUC Congress will debate "attacks" by the Government and private firms on pensions, which has sparked a long-running dispute in the public sector.
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Jamie Oliver has launched an expletive-filled rant against Boris Johnson, calling on the public to ensure he does not become Prime Minister.
David Cameron has addressed Parliament for the first time since Britain voted to leave the European Union.
The FTSE 100 Index fell to 2.55% to 5,982.2 at the closing bell as the financial markets continued to experience Brexit volatility.