As we've reported before, a growing number of companies are trying to escape the clutches of "interest rate swaps" - policies they signed up to with their banks that were meant to protect them, but in many cases have ended up costing them dear.
Tonight, the Labour party has written to the Chancellor George Osborne, asking him to join with them in calling for the banks to back off.
After hearing of stories of firms feeling bullied by the banks when they have complained, Labour is demanding that the banks promise not to treat companies differently just because they raise concerns.
And they are calling for businesses to be given the right to get out of their 'swap' deal without having to cough up. Many businesses have found the fees to exit the deal are crippling.
In the letter below, Labour asks the Chancellor to join them in calling for the banks to make these promises ahead of a debate in Westminster on Thursday: