There is an argument for the death penalty, but with this option there's always the risk of making a mistake, as happened with Timothy Evans. Maybe we should have a referendum on the issue.
With the exception of fundamental public issues, such as national sovereignty, I oppose the use of referenda. The question of restoring the death penalty should be left to Parliament, in my view. I favour it, but I am not an enthusiast for it. I just think the courts should be allowed to consider this option whenever it can be proved that murder is premeditated. There would then be reviews and appeals, and I assume, a plea for mercy to the relevant government minister - in other words, checks would be built into the system, in order to minimise error and recognise genuine remorse.
I wouldn't celebrate the judicial demise of a murderer like Colin Pitchfork, rather I would see it as a grim duty to be performed by the authorities as and when exceptionally necessary. I consider the principal argument for it to be the dignity of the victims and their families. That is why, in a sense, I agree with you Steve that the sight of a double child murderer lounging around on public benches in Bristol city centre is rather unseemly and must anger the families, but I disagree with you that it shouldn't be allowed. I must remind you: it was decided by Parliament to do away with the proper penalty, thus pragmatically (and, ethically), we have to be consistent and accept that if he has changed, then he has fulfilled his side of the bargain and he can go shopping in Bristol city centre, or a town near you. And the same applies to Jeremy.
Sorry.
I also agree with what you say about the risk of condemning an innocent man, but as you yourself will appreciate, that is not an argument against the death penalty, rather it is point to be considered for juries, judges and lawyers when conducting capital trials. We need to be sure before we convict anybody of anything, no matter how trivial, but especially so if there is the prospect of capital punishment.
Incidentally, I am not so sure that Timothy Evans was innocent, nevertheless that does not detract from the thrust of what you say.