| See here: https://fullfact.org/europe/eu-and-human-rights/ In the section "Wasn’t the UK supposed to get an opt-out from EU human rights laws?" The summary is, when the Treaty of Lisbon awarded the EU new human rights powers the UK and Poland negotiated an opt out which was written in the treaty. It was a part of convincing the UK government to accept the new treaty without granting a referendum on it, as they had previously promised. The opt out is very clear, really as clear as lawyers can make such things. It says: The charter does not extend the ability of the CJEU, or any court or tribunal of… the United Kingdom, to find that the laws, regulations or administrative provisions, practices or action of… the United Kingdom are inconsistent with the fundamental rights, freedoms and principles that it reaffirms and In particular, and for the avoidance of doubt, nothing in Title IV of the Charter creates justiciable rights applicable to Poland or the United Kingdom except in so far as Poland or the United Kingdom has provided for such rights in its national law http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:C:2... In other words, this part of the treaty does not allow the courts to overturn UK laws. Stated twice, for clarity. A few years later the ECJ decided that the opt out was meaningless and voided it, under a new interpretation that they claimed meant they'd actually always had these powers, and therefore the treaty did not "extend" them, and so the opt out didn't "work" despite its apparently clear wording. They then began overturning UK laws. It's unclear why the treaty had anything new in it at all if the courts had always had these powers of course, but this is how things go in the EU - no matter how plainly something seems to be written, no matter how clear the assurances seem to be at the time, the moment it becomes politically inconvenient to the project the rules are tossed out under bizarre and kafkaesque re-interpretations. Same thing happened to Ireland with corporation tax. They were promised the EU wouldn't interfere with their tax policies. Then the EU decided low taxes were "state aid" and awarded itself the power to control Irish tax policy. Nobody had previously interpreted the state aid clauses that way. |
> This Charter reaffirms [...] the rights as they result, in particular, from [various pre-existing sources].
The opt-out specifies that the Charter does not _extend_ the ability of the courts, but does not limit the powers that the ECJ already had prior to the implementation of the Charter. Even if the UK had a cast-iron opt-out (e.g. "The Charter, in its entirety, is not applicable to the UK, no rights are granted under it to UK citizens, and no court may refer to it in reaching a decision affecting the UK"), more or less the same results would likely be reached.
Also note Article 51(2): "The Charter does not extend the field of application of Union law beyond the powers of the Union or establish any new power or task for the Union, or modify powers and tasks as defined in the Treaties.". This is broadly similar to the UK/Polish opt-out, further suggesting that the Charter did not grant powers that the UK had not otherwise agreed to.
> In other words, this part of the treaty does not allow the courts to overturn UK laws. Stated twice, for clarity.
It does not grant them _new_ abilities to do so, and the second statement only refers to a subset of the rights considered under the Charter.
http://eur-lex.europa.eu/legal-content/EN/ALL/?uri=CELEX:120...