Calls were made earlier this year for the party to reveal the whereabouts of its recently set-up HQ, which produces party memorabilia including T-shirts, books and badges.
Party leader Nick Griffin confirmed in April that the HQ, called Excalibur,
was based somewhere in Deeside, but refused to reveal its exact location.
But this week, anti-fascist magazine Searchlight broke the news that it had tracked down Excalibur at the Evans Business Centre, a recently built development of workshops and offices on Deeside Industrial Estate.
They allege that the BNP occupies unit B2, 115sq m office, which does not bear the party's name anywhere on the front door, but say that neighbours are aware of its presence.
Searchlight added that the only indication that the unit is occupied is a note on the door giving three mobile phone numbers for deliveries, which were traced to party members.
The BNP's national treasurer, John Walker, of Mancot, refused to confirm whether or not the revelations by Searchlight are true and said that the party has been forced to keep its location a secret for fear of backlash from their political opponents.
"We will not confirm the location as we are not really interested in what Searchlight has to say," he said.
"The reason that left-wing extremists like this magazine are so keen to find out the location is so that they can find out details about our business, hoping that we will be denied the right to rent a property. It is an absolute disgrace.
"I do not know why everyone is so interested in where we are based. We are a legal political party and have as much right as everyone else to have a merchandising headquarters."
Mr Walker, who won a seat on Hawarden Community Council at the local elections in May, said that the party has no need to confirm its location as the store is operated via the internet and bulk mailing, and is not open to the general public.
He added: "Most of the merchandise we sell is of a non-political nature. We sell things like history books and items about British heritage and culture.
"I am an elected community councillor and I do not understand why there is so much controversy being stirred up over a political party, when we have every right to be allowed to operate a business without threats of intimidation."
However, the BNP has been branded racist by mainstream politicians, who say that they are unhappy that the party is operating its HQ In Flintshire.
Carl Sargeant, AM for Alyn and Deeside, said: "I am disappointed to hear that the BNP are using premises in Flintshire to distribute literature and merchandise that promotes aggression towards minority groups.
"It is a long-standing belief, that myself and Alyn and Deeside MP Mark Tami have been up-front about, that there is no place for the BNP in Flintshire or in the UK."
Should the BNP be allowed to have a merchandising headquarters in Flintshire?
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