Exactly! but up until now, these have been small tornadoes. what's the chances of a decent sized one?
Very, very small. We don't have the very large flat areas necessary to generate the storm conditions that tornados spin off from. It's no coincidence that the vast, flat central parts of North America are called 'Tornado Alley'.
And have been for decades, if not centuries.
In the same way that hurricanes are born in the Caribbean, and work their way clockwise around the east coast of America and across the North Atlantic to us, like the weather system that's on it's way at the moment, Hurricane Iris, I believe.
As I understand how weather systems develop, it's next to impossible for a storm system capable of spawning an F5 to develop in the UK.