Guns will never be legalised in the UK. What I can forsee though in the future, a fair way off yet, will be more policemen carrying guns. At the moment we have various armed response units but I think in time we will see plod on the streets carrying guns as a matter of course.
Of course they will have to be politically accepteable gun, so likely they will be plastic, fire 9mm "be nice to each other" leaflets, and have a loud warning klaxon when you press the trigger with a 5 second delay before the payload is released. They will be made in Germany.
On the current path of events a determined criminal in Great Britain is free to do whatever they like. Our police focus on easy targets for the sake of statistics, leaving the way clear for the less disreable parts of our society to act as they please.
The good news is that speeding in motor cars is on the descrease, and fewer cars are parked on double yellow lines.
Sadly violent crime is soaring through the roof, but that is OK because new ways of collating and presenting data show that it has levelled out.
Meenwhile if you wish to go outside it is recommended you train very hard at self defence and are a good runner. For gods sake dont fight back against an attacker else you will be "Terry Martin"'ed. Additionally do not use a motor vehicle to escape the scene of a potentially violent incident unless it is as stolen as those pursuing you, because your local friendly GATSO camera will persecute all those who legitimately own their own vehicle.
If you do feel the need to carry an item of self defence, make sure you are not an electrician carrying a screwdriver as this is an offensive weapon and will leave you open to procesucution. Case history dictates that the penalty for this is 2 years imprisonment.
Whatever happens, ensure that you do not inhibit your aggressors right to a safe working environment. This includes keeping hallways in side your house clear from debris in case you are burgled, and always ensuring that your car is safely wired incase a criminal electrocutes themselves trying to turn off the alarm.
All statements in this post are based upon real UK court cases. This is genuine advise. Please understand that whilst I wish this was sarcastic, it infact is not.
God created the world in 7 days, but we're still waiting for the patch.