Nick Griffin's British National Party, already under investigation for breaches of electoral law, is facing fresh allegations of corruption. Panorama uncovers new evidence of financial documents being falsified and fabricated in order to deceive the Electoral Commission. The programme also has evidence of the BNP's failure to declare major donations to the party. As Darragh MacIntyre reports, the BNP, which is better known for its controversial views on race, is in debt and according to its own published accounts appears to be technically insolvent.