Forces charity Help For Heroes will not accept donations raised by Tommy Robinson, leader of the far-right group the English Defence League (EDL), Channel 4 News presenter Krishnan Guru-Murthy said.
It is thought that Drummer Lee Rigby was wearing a Help For Heroes t-shirt or sweatshirt when he was murdered in Woolwich last Wednesday.
More top news
David Cameron will say the Tories are the party of the "grafters, roofers, retailers and plumbers" as he set out plans to help small firms
Lib Dem leader Nick Clegg will say his party are fighting '60 Eastleighs' on the campaign trail in the Hampshire constituency today.
The late Coronation Street actress Anne Kirkbride has been nominated for a British Soap Award.