A Wearside intensive care nurse will stand against former shadow home secretary David Davis in the by-election he called over the battle for civil liberties.
Rosalyn Warner, who works at Sunderland Royal Hospital, today announced she will be the official Monster Raving Loony Party candidate for Haltemprice and Howden in Yorkshire.
Miss Warner, who will stand as Mad Cow-Girl, will be up against Tory Mr Davis, who controversially resigned his seat to trigger a by-election to gauge public opinion of the law change to allow terror suspects to be held for 42 days without charge.
"We like to have fun when we go to elections," she said. "That's what we're in it for.
"But on this occasion it seems that the sensible candidate is acting like a loony, so it's up to the Loony Party to try and act sensibly.
"What a topsy-turvy world we live in."
Mad Cow-Girl, 46, from Hendon, added: "I believe in the rule of law and order.
"Why should we have people walking the streets that are not safe?
"We need to support the police and give them the power to do their job properly and not tie their hands behind their back."
As well as Mr Davis, she is expected to be up against former Sun newspaper editor Kelvin Mackenzie; anti-war market trader Eamonn Fitzpatrick; author Neil Glass; Eurovision contender and sixties crooner Ronnie Carroll; and Miss Great Britain Gemma Garrett, representing Beauties For Britain.
Labour has refused to put up a candidate, calling Mr Davis's actions "phoney".
The Liberal Democrats will not enter a candidate because the party agrees with the Tory's stand against the 42-day pre-charge detention plans.
Miss Warner is originally from Essex, but has lived on Wearside for 10 years.
She said: "After a two-week visit to a friend in Sunderland I quickly decided that the friendliness and hospitality of the people up in the North East of England was my kind of society.
"The north-south divide does exist in my opinion – the north being a much more pleasant place to live."
Miss Warner is secretary of the Monster Raving Loony Party, and won 291 votes when she stood against Chris Mullin as Mad Cow-Girl in Sunderland South in the 2001 general election, and 149 votes in 2005.
She also came third in Hendon ward in the 2000 Sunderland Council elections, beating the British National Party.