What's the secret behind British toilets never getting clogged?

I come from a country where the water pressure for toilet is quite weak in general, and I had my fair share of making my mom very happy by clogging the heck out of our poor house toilet.

Here it seems like toilets never ever get clogged no matter how recklessly I challenge them, almost feels like the work of god, might as well start a religion out of it. I've also noticed that British houseware stores don't usually bother selling plungers because they hardly need them.

So what is the secret behind this miracle? How come British toilets never get clogged?