A great gesture, but sadly I'm sure all these national letter agencies will find a loophole in laws or pass some bills to push their agenda anyway. You know as a usual story goes -- "but terrorists!", "think of the children!" etc. Enforcing EHCR ruling was never a strong side, on the way of it becoming a national law (if ever), it often gets diluted or (purposely) misinterpreted.
Given that our Home Secretary recently stated that 'the UK does not undertake mass surveillance' to the investigatory powers government committee, I can't see this having any semblance of an effect (over here, at least).
Forgive the nitpick, but it's an important distinction: this is the European Court of Human Rights, not the "Eu" [sic] court of anything. It is a separate institution from the EU and has non-EU adherents, like Russia for example.<p>Another point: the court has no enforcement mechanism. I suspect if all the major European powers disagree with one of its rulings, they will easily be able to flaunt it with impunity.