By Elena Siniscalco [Re:Oslo has come up with new ideas for the housing crisis , London should do the same, Sept 16] Bravo to Copenhagen’s longest serving Mayor in “Oslo has come up with new ideas for the housing crisis , London should do the same”. Sadiq Khan should reflect on his 6 years’ of mediocre housing delivery. Mr Mikkelssen’s ideas are achievable because the Mayor owns land the size of the London Borough of Camden. This isn’t rocket science. A Listed House Builder reported last week that housing starts have halved since 2015 in London, in his view , they will halve again. Come on Sad…