Just one fifth MPs have declared a formal role, such as being a trustee or patron, at a charity or civil society organisation, according to our analysis.
Some MPs have been under fire this week for the paid employment that they undertake alongside their constituency work, but MPs across all parties are also serving as trustees or patrons for charities.
Civil Society News has been through the latest MPs register of interests and identified that 130 out of 650 have a current, or recent, formal role with a voluntary organisation.
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