On 24 July 2018, the Government issued revised guidance on viability in plan making and decision taking which can be viewed on the  GOV.UK website The guidance states that any viability assessment should be prepared on the basis that it will be made publicly available other than in exceptional circumstances. Even in those circumstances an executive summary should be made publicly available. Information used in viability assessment is not usually specific to that developer and thereby need not contain commercially sensitive data. In circumstances where it is deemed that specific details of an assessment are commercially sensitive, the information should be aggregated in published viability assessments and executive summaries, and included as part of total costs figures. Where an exemption from publication is sought, Spelthorne Planning Authority must be satisfied that the information to be excluded is commercially sensitive. This might include information relating to negotiations, such as ongoing negotiations over land purchase, and information relating to compensation that may be due to individuals, such as right to light compensation. The aggregated information should be clearly set out to the satisfaction of Spelthorne Planning Authority. Any sensitive personal information will not be made public.

All viability assessments submitted to the Council from 24 July 2018 onwards will be made publicly available other than in exceptional circumstances.