I will echo my colleague's comments just now and say it's of course open to Parliament to legislate retroactively, but it is inherently complex, because we're talking about applying new laws to facts that have occurred in the past. Particularly if we're talking about a period of time some 80 years in the past, it's very difficult to say precisely what the consequences might be. In particular in this case, with the legislation that existed prior to 1947, it's difficult to say with precision exactly how these amendments might interact with legislation from that time period.
On May 15th, 2023. See this statement in context.