Hi Fleece & Mick G,
The "Nosegay" brand introduced in 1898 by W&F Faulkner. This was an old firm established in 1838 at 130, Blackfriars Rd, London SE. Became a branch of Imperial Tobacco Co Ltd in 1902. "Nosegay" - "Union Jack" & "Grenadier were a few of the popular brands. You don't see much of advertising from this firm. Apart from a "Nosegay" tin, I have posted my "Friar Flake" and "Nosegay" enamel Thermometor which I don't have anymore. I would say your sign is quite a rare item.
bacco