Campaigners against the Bedroom Tax will protest across the region today to mark a year since its introduction.
Hundreds of supporters from all over Yorkshire are expected to join the Leeds campaign Hands off our Homes.They will celebrate a year of campaigning that they claim has put the government on the defensive,
There will also be a protest in Lincoln, organised by the Unite Community branch in Lincolnshire.
Nearly one third of disabled people hit by the so-called bedroom tax have been refused discretionary payments to help them meet the shortfall in their rent.
Demand for the support has tripled this year but applicants face a postcode lottery when it comes to being accepted.
The National Housing Federation found that 29% of disabled residents - more than 3,800 people from the 98 local authorities who responded to Freedom of Information requests - in England who asked for help following the reforms were rejected.
In parts of Kent the success rate was just one in ten, while the level rose to nearly three in North East Derbyshire, Rotherham and parts of Lancashire.
Overall, seven in ten people affected who applied for a discretionary housing payment in the first six months of the policy received one, the study found. But in parts of North Yorkshire the rate fell to just two in ten.
National Housing Federation chief executive David Orr said: "Whenever ministers are challenged on the bedroom tax, they tell us vulnerable people are not at risk because of these discretionary housing payments.
"Now we know the truth: this so-called bedroom tax protection is starting to look like a postcode lottery, with many disabled people and vulnerable families facing miserable odds of getting help.
"Even those who are lucky enough to get support will have to reapply time and time again, each time facing the stress and worry that the funds will be withdrawn, while councils are being inundated with applications.
"This support fund is ineffective and deeply unfair - just like the bedroom tax itself. The only real solution is to repeal it."
The Department for Work and Pensions spokesman insisted the money available to councils to make discretionary payments had gone up significantly.
A spokesman said: "We more than tripled the money we give to local authoritiesto £190m this year to ensure that help was available to those who need it most.
"The cash was given to local authorities to distribute because they deal with their customers on a day-to-day basis and are best placed to see to it that the money reaches those who have the greatest need.
"We will continue to monitor progress closely while our reforms bed down."
More council tenants in Leeds are falling into arrears on their rent after the introduction of the so-called 'bedroom tax'.
Around 2800 tenants out of 5200 tenants who had a clear rent account before the charges began, have already fallen into rent arrears.
Dozens of people have attended a protest in Grimsby against the Government's so called 'Bedroom Tax'. The event was organised by a new group associated with the union Unite.
Those affected by the recent Government changes to housing benefits now have to pay around 14 pounds a week extra if they have spare bedrooms, or move. Kate Hemingway reports.
Protestors against the Government's so-called 'bedroom tax' are holding a rally in Grimsby. It has been organised as part of a campaign by Unite Community, a new scheme launched by the Unite Union.
The rally is being held as a public display of the frustration and anger felt by union members, who say people are being made 'victims' with the introduction of the new tax.
Around a hundred people have marched through Barnsley today in protest over the government's so-called 'bedroom tax'. The march started at Barnsley college and ended at the Town Hall where a rally was staged.
Hundreds of protestors against the government's so-called'bedroom tax' are expected to attend a rally being held in Barnsley. More than 4000 people could be affected by the new changes to benefits which came into effect on April 1.
Hundreds of people have marched through Leeds protesting against changes to the welfare system. They're campaigning against what opposition politicians call 'the bedroom tax' - where those with a spare room have the benefits cut. James Webster reports.