Someday all British cops will be qualified to carry a gun, hopefully, in the meantime they should at least let American tourists carry the same guns that we wear back home.
The majority of British police and public, inc myself, do not want an fully-armed police. I wouldnt be adverse to all UK police being at least trained in firearms, and I want more armed units, but for all the hype, UK serious violence, gun crime/gun murder/terrorism, is still very low. Even most UK criminals overall arent armed. The UK has not (and will never reach) the level of violence that means an all-armed police force.
Nope. Britain, for all the hype, and yesterday, is still a safe country to live and travel in. You do not need weapons whilst travelling here. Millions of Americans and tourists come to the UK every year and are safe and have a great time with no crime. If you cant abide by our laws and culture, dont come.