Isn’t it just a perfect exam question for a graduate course, nay this question involves so many issues it could arguably serve as one single exam for a whole law degree: such is the intensity of legal areas at issue: constitutional law, international law, international trade, regulatory law and risk analysis, intellectual property law…
Discuss why the Court of Appeal for England and Wales denied Government wrongdoing in plain packaging, while the German Bundesverfassungsgericht rejected an argument of expropriation in Energiewende yet held that German Government must nevertheless pay compensation to the energy companies involved (E.ON, RWE and Vatenfall).
Source tip: you may want to consult my former student Dr Catherine Banet’s excellent analysis on the Vatenfall issue.
Issues tip: a good way to go about it would be to draft a table of issues that both cases have in common and those which they do not (eg the Court of Appeal’s review of intellectual property). A discussion of the precautionary principle would not go amiss (in the plain packaging case: specifically whether precaution applies to uncertainty as to efficiency of remedies rather than uncertainty as to a phenomenon). A point of discussion may also be why the CA refers profusely to European precedent while the Bundesverfassungsgericht does not. Finally, any consideration of the link between the latter proceedings and the concurrent ISDS procedure, will gain you brownie points.
To fellow faculty out there: if you do use this exam Q, please do share good student answer copies.