Having looked at the Royal Mint website, it seems that the £110 refers to the proof Quarter Sovereign. The Half Sovereign is £190 and the Sovereign is £360. There are also bullion versions that are a bit cheaper, but not that much.
I suspect the Skipton Castle Collection on Heritage will be more to your liking, VS. However, given the number of MS 65, 66 & 67 grades, the prices are sure to be stratospheric.
I would say look at the edge inscription. This seems to be the hardest part to fake convincingly. It should be a well formed gothic script, nicely centred (top to bottom) all the way around.
We are talking at crossed purposes, Stuart. Dave's post references an 1862 florin, which is what I replied about. I agree with you, if we are talking godless 1849 florin.
"Extremely rare...almost impossible to locate in any grade"WHAT? They are rare and not easy to obtain, but I think I'd save his description for the 1863 florin.
I make no distinction between wear and weakness. The fact remains that a substantial portion of the design is missing. It wouldn't be more than EF money to my mind, regardless of the given grade.
The Coinage Act was amended in 2011 to allow variations to denominations and/or specifications to be made by proclamation. More details here. However, I don't know where the actual proclamations are published that allowed the £5 coin, £20 coin etc to become legal tender.