Work and Pensions secretary IDS has confirmed to Rachel Reeves that he won't take part in the planned Labour debate on the "bedroom tax" , ITV News understands.
There are a number of demonstrations against the policy planned around Westminster to coincide with the debate.
Shadow secretary for work and pensions Rachel Reeves is calling for MPs to vote on a labour motion to repeal the policy.
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The Labour leader said newspapers were going "a little bit James Bond" over the "increasingly wild and entirely false" claims.
The "astonishing" find was made during an excavation at Vindolanda, near Hexham in Northumberland.