It is not clear to me that any of the constitutional documents in the UK enshrine a right to silence. The Right to Silence in the U.K. is generally built up on common law, not statue. Every essay I have ever found on this topic refers to the right to silence in the UK as predicated on common law, not on statute, let alone on a critical constitutional document that would require explicit repeal.
So yes, Parliament cannot implicitly repeal some documents. But I don't think that the Right to Silence is in any of those. Of course, citations to the contrary would be welcome!
It is not clear to me that any of the constitutional documents in the UK enshrine a right to silence. The Right to Silence in the U.K. is generally built up on common law, not statue. Every essay I have ever found on this topic refers to the right to silence in the UK as predicated on common law, not on statute, let alone on a critical constitutional document that would require explicit repeal.
So yes, Parliament cannot implicitly repeal some documents. But I don't think that the Right to Silence is in any of those. Of course, citations to the contrary would be welcome!
EDIT: And in fact the law has been challenged, all the way to the ECHR. The challenge failed: https://www.theguardian.com/uk/2007/jun/29/transport.eu