Yeah it's frustrating a lot of the easy to come by bottles are overseas produce.Yea annoyingly, if you look you'll find most vegetable oil (which is rapeseed oil lol) particularly sold in supermarkets here, actually comes from overseas, which is ridiculous really, because as you say it's grown here.
Seems to be the way with quite a few things, I know my OH often spends a good while hunting for UK grown/produced things.