Sadly the UK climate does not allow for olive growth. With yhe cost of everything rising the idea of having oil from your own olives is very appealing.
Maybe you should consider selling some to fellow Hivians, I'm sure post and packaging costs would be worth paying for such a product.
I do occasionally sell oil. but posting charges will make the price ridiculous. and a headache.
part of living on the land, providing my own food is to break away of such necessities.
since I do not have to buy many things, I live very very cheaply which saves me having to worry about selling for extra income. my time is then spent on what I like doing.