In 1961, with the passing of the Suicide Act, it became no longer illegal to kill yourself.
Obviously, if you had succeeded, you would be judged by a higher court, but until then if you botched your attempt at doing yourself in you could be prosecuted.
Naturally you might even now be in breach of some by-law, like jumping off Beachy Head, but in broad terms I am allowed to buy a carving knife (if over 18) and slit my throat, hold a shotgun to my head (if I have a licence for the weapon) and pull the trigger, or jump off the roof of my house.
But I am not allowed to kill myself by going through the windscreen of my car (through not wearing a safety belt) or throwing myself off a motorbike without a helmet.
Why? Don't tell me it is because the NHS has to pay money to treat me if I fail: we don't make it illegal to live in a town (more likely to suffer from respiratory disease), or climb a mountain (risk of falling off) or to be a promiscuous homosexual (more likely to get AIDS). The NHS is an insurance scheme: if you are a cautious healthy individual you pay the same income tax as a heavy drinker or smoker. Why do we single out drivers and bikers?
The fine imposed by this supposedly Conservative vindictive nanny government for not wearing a crash helmet is £2,000. Some MP ought to have the balls to propose the abolition of these 'crimes'.