Source text: UK Labour MPs are set to propose amendments to the Representation of the People Act, aiming to permanently ban cryptocurrency donations to political parties. The proposed changes, expected next week, also include reducing the campaign spending cap from £34 million to £24.4 million, limiting initial funding for new parties, and conducting national security risk assessments on donations. These measures are backed by a cross-party anti-corruption group, gaining traction after a funding controversy involving Nigel Farage’s Reform Party and a multi-million pound donation from crypto entrepreneur Christopher Harborne. Liam Byrne, chair of the Labour Business Committee, highlighted ongoing concerns, stating, "Every week brings new disclosures showing the extreme measures Reform Party politicians take to dodge financial oversight." The push for reform follows reports of a connected transaction involving George Cottrell, flagged by a bank to the National Crime Agency, further intensifying scrutiny on political funding practices. Target language code: pt Translation instructions: This is the news article content. Please maintain the original meaning.