[ectopod]

Just to be clear, the ECHR is not an EU court and brexit Britain is still under its jurisdiction.

https://en.wikipedia.org/wiki/European_Convention_on_Human_R...

[M2Ys4U]

And one cannot appeal a case from the court of a member state to the CJEU. Member states' courts can (in some cases must) refer specific questions of law, but that is not an appeal by any party to the dispute.