England
Hazelnut Syrup from William Fox. Tastes rather similar to those hazelnut spreads you can get for baking - except it's a liquid, rather than a... Wait, where does spread sit in terms of "Liquid" and "Solid" definitions? A question for the ages.
Please note: Once opened, use your tasty William Fox syrup within a month.
Creamy and vanilla forward, with a touch of sugared almond and toasted walnut.

Can't fault it. Makes a very interesting Espresso martini
I'm sorry but this stuff is awful! It claims to be entirely made of natural ingredients but it tastes really 'chemically' and burnt. Just 5ml in a cocktail and it's ALL you can taste! Even mezcal can't stand up against it...