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Newsnight has seen new figures which point to what could be a significant reduction in the amount of social housing that can be built over the next decade.

The bill to make council and housing association properties fire safe - under the new building safety regulations - is coming in at an estimated £18bn.

The National Housing Federation tells Newsnight that means nearly 1 in 10 - around 13,000 - new properties now won't be built over the next five years.

Policy editor Lewis Goodall reports.