You could try Kerr v Department for Social Development <2004> UKHL 23
As a House of Lords decision, it seems like a good decision, and in terms of UK law, about as high as you can get...
I have it, but have not yet read it in full, but it seems to meet some of your criteria....
Not sure if it is on Rightsnet or freely available elsewhere, as have not needed to search for it, but if it isn't to hand, post back, and I'll e-mail to Shawn for publication...
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