The 29-year-old Bradford man was arrested on Monday on suspicion of a racially-aggravated public order offence and is being held in custody.

In July, the BBC documentary The Secret Agent featured covertly-filmed footage of BNP activists.

Four men from Bradford and four men from Keighley have already been released on police bail.

Six of them - two 23-year-olds, a 51-year-old and a 45-year-old all from Bradford, and two men aged 35 and 40 from Keighley - had been held variously in connection with suspected racially aggravated public order offences, conspiracy to commit criminal damage and possession of a firearm.

Two other Keighley men, aged 38 and 47, were arrested last month on suspicion of conspiracy to commit criminal damage.