R (ota Lumsdon) v Legal Services Board  UKSC 41, 24 June 2015 (see judgment)
The Supreme Court has reminded us, in a tour de force by Lord Reed, that there is no such thing as one-stop proportionality. It varies between ECHR and EU law, and the tests of EU proportionality then vary according to the nature of the EU issue in play.
And all this in a case about trying to improve standards for barristers’ advocacy.
Barristers challenged the Quality Assurance Scheme for Advocates or QASA, on EU grounds. QASA requires barristers in the criminal courts to be assessed by judges before they are allowed to take on certain categories of cases.
Its EU-ness arises in this way.