Aren't BCC selling the NEC because they have a huge whole in their budget that they need to fill. Because the NEC is successful they can sell it for vast amounts of money and fill this huge hole or at least a large percentage of it.
If they find SISU were also responsible for their actions the judge can choose not to even reverse the decision by the council it can still stand. It is in the judges discretion not to apply any remedy if he feels SISU's behaviour was at all unreasonable
The application of remedies once a Judicial review has been won are governed by the discretion of the judge .....
The discretionary nature means that even if a court finds a public body has acted wrongly, it does not have to grant any remedy. Examples of where discretion will be exercised against an applicant may include where the applicant’s own conduct has been unmeritorious or unreasonable.
So there is always the potential when someone wins a judicial review that nothing changes including reversing the decision.