UK politicians, especially those on the right, were never big supporters of the European Convention on Human Rights and often express their desire to circumvent it (see the linked Guardian article in another comment), or to remove its applicability from UK law altogether.

Supporters of human rights may find comfort in the fact that the UK is actually bound to the ECHR by various international agreements, including the Good Friday Agreement. This severely limits politicians' ability to scrap its applicability altogether, despite their repeated promises to the contrary. This excellent blog post from June summarizes all this well: https://davidallengreen.com/2022/06/oh-no-not-again-the-stor... .

Most recently the UK government introduced a "Bill of Rights". Despite its name, it changed little with respect to the applicability of the ECHR, but it does make it harder (again) for litigants to rely on the Convention in practice.

(Note that the ECHR, both the court and the convention, are completely separate institutions from the EU.)