British prime minister Gordon Brown faces questions in the House of Commons today over the funding row that has engulfed the Labour party, the latest in a series of setbacks to rock his government.
Property developer David Abrahams
Despite condemning the donations as illegal and pledging to return them, Brown will face more calls to explain what he knew about the £600,000 that property developer David Abrahams donated through intermediaries.
Conservative MPs say the affair is "getting murkier by the minute" and will attempt to pile on the pressure at Prime Minister's Questions at midday.
Electoral laws require those making donations on behalf of others to give details of the source of the money.
Mr Abrahams said he didn't realise that using middlemen to donate to Labour was illegal and that he had merely wanted to avoid publicity. "Until Friday, I didn't know it was illegal," Mr Abrahams told the BBC. "If I had known at the time, I would most certainly not have donated in that way."
One of those named in the media as an intermediary, secretary and school lollipop lady Janet Dunn, said she was a lifelong Tory and knew nothing about the payments.
Labour's General Secretary Peter Watt resigned on Monday after the row began at the weekend. Deputy Labour leader Harriet Harman said she will return £5,000 she received for her leadership campaign.
Labour said it had launched an inquiry.