 He also wrote to Dame Suzi Leather, the Commission's chairwoman, requesting that the Alliance's charitable status be immediately suspended; he has in the past called the Alliance "a Conservative Party front".According to another report, Americans for Prosperity, another Tea Party group which claims to have 1.5m activists and is headed by oil billionaires, Koch brothers of Koch Industries, was also represented at the London conference, and helped fund it.In 2018, the TaxPayers' Alliance conceded that it illegally vilified and sacked the whistleblower Shahmir Sanni, on the BBC and on the website "Brexit Central", for revealing unlawful overspending in the Brexit referendum campaign.