Work provided information concerning City’s finances He called City decision ‘historic for English football’ Rui Pinto, whose leaks of private documents helped to trigger the Premier League’s investigation into Manchester City’s financial affairs, will no longer be a protected witness by the Portuguese authorities, it can be revealed. The removal of the whistleblower’s protection was decided on Wednesday, according to documents seen by the Guardian. Pinto has also been advised to “exercise caut…