That's a beautiful bottle! Tough to guess the value because not too many of us are familiar with the UK bottle market. Age-wise I'd guess roughly 1900, give or take a decade or so. I haven't seen those poison-style lips used on bottles much older than that as far as I can remember. The three piece mold and applied lip would indicate it was much older if it came from North America, but the older techniques were used for quite a bit longer in the UK.