Re: The sound you hear are the snorring pigs
AIUI this would have an impact on the Good Friday Agreement.
Possibly. The agreement required that the government "agreed to incorporate into Northern Ireland law of the European convention on human rights (ECHR), with direct access to the courts, and remedies for breach of the convention, including powers for the courts to overrule [Northern Ireland] assembly legislation on grounds of inconsistency." so any repeal of the HR Act, and replacement with some other legislation like a new Bill of Rights would need to take that into account.
Unfortunately some people try to equate "'repeal of the HR Act"with "withdrawal from the ECHR", they are distinct issues.
Prior to the HR Act, British courts were required to make judgememts based on British law, as determined by Westminster. If someone felt that any judgement contravened their rights under the ECHR (which the UK is signatory to) they could take the government to the European Court of Justice and complain that the law was incompatible with the ECHR. The resulting discussions would happen at governmental levels, and if the complaint was upheld the UK would be expected to change the law.
What the HR Act did was to short-circuit this, and require UK courts to directly rule according to the ECHR, effectively placing the ECHR above UK national law. This is why some peope are concerned about it, it places UK courts + European law above UK law as determiend by Parliament. Simply repealing the Act will return to the situation pre-1998, it won't change the UK's responsibilities under the ECHR, it just means that plaintiffs would have to prove that that a UK judgement violated the ECHR, instead of the situation today where the UK has to prove that it did not.