This from Capita website.

School Census Summer 2008 Consolidated Patch for Secondary Schools in England with Sixth Forms

Patch 11860 has been made available to support units on SOLUS and resolves a number of issues in School Census for schools with Sixth Forms. It should be applied by those schools who wish to run the School Census Summer Return for 2008 but are unable to upgrade to the May Main Release in time for the May 15th Census Return Day. This patch can only be applied to either the SIMS February 2008 Main Release or SIMS March 2008 Update releases.

Once applied the upgrade to the May 2008 release will be able to be undertaken in the normal manner. Further details can be found in the Release Notes and we recommend that this is read before the patch is applied.

Jim Haywood
Phew! Thank heavens for that.