A response to the draft RICS consultation guidance has been submitted by the Deputy Mayor for Planning, Regeneration and Skills on my behalf and I’m happy for it to be shared with the London Assembly. The draft guidance has been informed by members of my Viability Team who have sat on its working group alongside other external organisations. I support the intention to replace the previous RICS guidance on viability from 2012, and in particular, to change its approach to determining ‘benchmark land value’ which had contributed to a reduction in affordable housing in London. This should have a beneficial impact on planning in London by striking a better balance between the need for the delivery of sustainable development, affordable housing and infrastructure, and landowner and developer returns. The consultation response identifies a number of areas where further changes are sought to provide greater clarity and improve the process for viability testing.