National Front extremists will fight the rival British National Party at the general election.
The clash follows a court ban on the BNP accepting new members because its rules are loaded against non-whites.
Nf activists claim their membership has surged by 70 per cent, swelled by BNP defectors angry at attempts to force them to comply with anti-racism laws.
The National Front hopes to field 25 election candidates, including one against BNP leader Nick Griffin.
Anti-fascist group Searchlight's spokesman said: "Griffin's humiliation has enraged his members."
The Mirror