Should we bring back the death penalty here in the UK?

The waves of crimes including cyber bullying and terrorism just doesn't stop, while we can find the perpetrators they are simply let off too easily for example recently in the Amanda Todd case the blackmailer wrote a letter saying he was "innocent" which made me very angry at how he doesn't have any remorse for Amanda's death and was only sentenced for 11 years in prison this year like is this a joke? The blackmailer deserves the death penalty because people like him just don't change.
If we bring back the death penalty crimes both physical and online will drop.
So what do you guys think?

If we bring back capital punishment, what method would we use?

Hanging?
Lethal injection?
Electric chair?
Gas Chamber?
Firing squad?

Also will it be for the whole of the UK or just England and Wales?

YES. Why on Earth should the taxpayer have to pay through the nose to keep them locked up in prison? Much more convenient just to dispatch of them immediately.

Whichever is the most efficient and humane. Most likely the injection.

When someone has done something serious enough to have to be given the death penalty, who cares how humane it is. I do agree with the most efficient way though.

I have a better idea everyone.
Please hear me out.

What if we got criminals to run on a hamster wheel that would also generate electricity. Instead of giving sentences in years we give them in Kilowatts. Those who have committed extremely heinous crimes can run for the rest of their life. Simples.
What do you guys think?😁😁😁
We get free energy and the criminals get punished.

To give power to a judiciary (which ultimately means giving power to a government) over the lives of its people is wrong in too many levels to even discuss it.

Thats too simplisitic. Also, we have a juries, you realise that right.

That actually sounds pretty sensible!

It is also true that parliament makes laws, not the jury, not the judge. Political systems are constantly evolving, and what we have right now is probably not what we will have in ten or a hundred years' time: that is why basic, positivist, "simplistic" values are necessary.

So you're problem is that a democratically elected government can make laws?

No, my problem is that you just pulled a big fat straw man on me.

So people elect a hypothetically hugely majoritarian government, then the government, using its populist political capital seizes the judiciary (appointment of supreme court etc...), creates laws as it mays and threatens its opposition through wielding the power of surreptitiously used death-penalty. That's the problem.
The problem also lies when society makes arbitrary moral judgements and uses the death penalty to steal the life of an otherwise innocent individual (take death penalty upon gay sex as it happens in many religious-majority countries).

Don't say this kind of stuff doesn't happen, it has happened in South America and Africa too many times to count in recent history. I should also add that in many countries minor treason is punished with death penalty as well.
Of course the UK isn't Africa or America, but this kind of turn of events has happened in European countries in the very recent past.

This is why death penalty is wrong in principle, because it places the life of a human at the mercy of society. This then causes multiple metaphysical disparities: what is the point of "always protecting life" in medicine, if society decides which lives are worth keeping?.