Rachel Reeves during a visit to the Fairham Development, a housing development site in Nottinghamshire.Rachel Reeves will announce plans to spend nearly £40 billion building affordable homes in a bid to solve the UK’s housing crisis.The chancellor will outline details of the cash boost in the spending review on Wednesday.It will be seen as a major victory for Angela Rayner, the deputy PM and housing secretary, who has been locked in a battle with the Treasury for more funding for her department. Under the plans, £39bn will be spent over the next 10 years on a social and affordable homes programme, which works out at £3.9bn a year.The last five-year programme, which comes to an end in 2026, was worth £11.5bn, or £2.3bn a year. A government source said: “The government is investing in Britain’s renewal, so working people are better off. “We’re turning the tide against the unacceptable housing crisis in this country with the biggest boost to social and affordable housing investment in a generation, delivering on our commitment to get Britain building.”Reeves will confirm plans to spend billions on new transport links in the north