Just fixed that statement to be a little more accurate.
Growing up out in the country for me, there were never any salesmen like that. People only arrived unexpected at your door if they were old friends just passing through, farmhands, the sherrif with questions (usually about some murderers that managed to escape prison and had reports of them running off toward our area of nowhere), and people with cars broke down on the highway. Well there were a few stranger instances but that's the reason for the Remington (in my case a Winchester
)
Now living near a campus for college, I usually get short sorority girls trying to sell me magazine subscriptions and the like. Very strange to me but the 12 guage is still within reach of the door just in case a wierdo shows up.
Are tasers legal in Britan? I would think one of the gun tasers would be a good home defense option (mace and a maglite are cheaper by far though and pretty effective).
One piece of advice I haven't seen mentioned here is that whatever you have, be willing to use it. Predators and generally bad folks can tell if you are unsure of yourself. If you pull out a weapon of any kind whether it's a baton or mace or knife or taser, do it because you are pulling it out to use it, not to threaten someone. Crazy people are usually not to deterred by threats of non-lethal weapons (or any weapons for that matter), if you hesitate it's likely they will take it from you and use it against you.