What is the LLDC so keen to hide?

As many of you will know, the Canaries Trust is one of a group of 14 Trusts that have pushed for full disclosure of the deal giving West Ham use of the Olympic Stadium with the taxpayer footing most of the bill. West Ham will also keep the full proceeds for the sale of the Boleyn Ground.
Despite the Information Commissioner ruling in our favour and ordering full disclosure, and the Mayor of London, Boris Johnson, claiming to be relaxed about the decision the LLDC have today started legal proceedings to block the information becoming public. Now why would they do that?