Among other reasons. Court Cases can take years to run and anyway, any half literate Barrister can tie a Court in knots.
My solution. Make all records available to the Press "asap", also have a look around for any details pre April 2005.
As our Government has proved almost incapable of holding onto any information of value, I'm sure that there a few (unaccounted for) Hard Drives lurking somewhere in the Corridors of Power.Wheel them out and tell us who has been pushing the limit of our generosity.
After all it is an MP's probity that we rely on.