In written evidence, the Home Builders’ Federation (HBF) was very sceptical about the basis of MHCLG’s estimates of building numbers and the lack of any updates. It told us that MHCLG’s estimate of the likely number of buildings in need of remediation was based on assumptions that were “long outdated and highly questionable”. EOCS also highlighted the importance of collating data on the remaining buildings in need of remediation, without which it described MHCLG’s Remediation Acceleration Plan as “a plan to make a plan.” 61