Young middle-class professionals are half as likely to get on the housing ladder as they were 20 years ago, a new study has found as Tory MPs warned that the issue is an “iceberg” that could sink the party at the next election.

A report by the Institute for Fiscal Studies said that just one in four young middle-income families now owns their own home, down from two in three in the 1990s.

It means qualified workers including teachers, nurses, tradesmen and administration workers, who could once comfortably buy their own home, are now stuck renting into their thirties.

It comes amid mounting concern in the Conservative Party that the Government is failing to build enough homes.