Digby v East Cambridgeshire District Council [2007] IRLR 585
A tribunal has a discretion, in accordance with the overriding objective, to exclude relevant evidence which is unnecessarily repetitive or of only marginal relevance in the interests of proper, modern day case management.
However, that discretion must be exercised judicially. It may properly be challenged on appeal on Wednesbury principles. The guiding principle is to ensure justice between the parties.