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.
A very late reply. But Carbolic Acid had an important spot in the history of modern medicine! It was the first universally accepted antiseptic, thanks to Dr. Joseph Lister- a British surgeon who studied Pasteur's germ theory. Carbolic Acid was sold for this purpose (reference the text on your bottle where it talks about cleaning rooms) starting in the mid-late 1860s. Lister used a diffusing/spray device to clean surgical rooms and tools prior to use.