Labour's shadow environment secretary Maria Eagle has accused the government of "fiddling the figures" on flood spending.
She said figures from Defra showed that spending had been reduced by around £97 million from 2010/2011 to 2011/2012.
Ms Eagle also contested the Prime Minister's claim that more would be spent between 2011 and 2015 than in the previous four years, asserting that Defra's figures showed the opposite was true.
Ms Eagle said a freedom of information request had shown Environment Secretary Mr Paterson cut more than 40% from the domestic climate change budget last year.
She asked Local Government Secretary Eric Pickles: "Was this really the right priority for the biggest cut to any Defra programme?"
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