Your country have had a long history of tyrants, do you not? Two that comes to mind is William the Conqueror and Bloody Mary. And, while I know that your country is no longer run by absolute rulers but by parliament, the fact that change like Brexit (a good thing, IMHO), or the realization that Trump became America's president can unexpectedly happen.
The question of tyranny is not if it it happens, but when. Desperation we've seen in Greece gave rise to the ultra right in that country; how long until they gain power? We've seen that before, yes? Hitler, with amazing charisma and skillful use of demagoguery needed only 40% of the vote, and the country is virtually his.
If you see the same happening in your country, will you finally understand the value of the 2nd Amendment and buy firearms? But oh... it's a bit too late to buy the right ones isn't it? Do you honestly think that your government, when it descends into corruption or oligarchy, will allow you to buy semi-automatic, center-fire rifles, with normal or higher capacity magazines, w/out registering it to government (so they won't take it from you when you become a political threat to them)?
Firearms are so regulated in your country that you're limited to pump-actions, and bolt action rifles. Against a government with its troops equipped with select-fire rifles and machine guns your armament is only be a little better than, "spit-balls".