Oh. Then why aren't
I seeing them?
And spiders can't hurt you - to the best of my knowledge, Britain doesn't have a single species capable of biting us. They're all too small. If you see a spider, please leave it be - they're more scared of you than the reverse. They'll scuttle off soon enough. We
need them - without them we'd be knee-deep in flies.
Same with bats - vampire bats only exist in South America and don't prey on us anyway. Every British species (all protected by law, rightly IMO whatever that cow Reeves might say) is small - essentially they're mice with wings.
I was surprised to discover daddy-long-legs are persistent little beggars; they've been around, Wikipedia says, for 245 million years - they're among the oldest species of fly. Maybe their inadequacy acts in their favour.

To be so successful, they must have
something going for them. Flipped if I know what, though.