It's a Samsung box and the phone has no Orange branding. It merely came from the Carphone Warehouse with an Orange Sim inside the box. The box bears the name i5800, as does the phone on switch-on. Looking at your link, the phone has the angled home key and shiny back of the i5800. No Orange badge externally; no Orange branding in the software.
I do not have another SIM card to try in it, and judging by the difficulty the man at Carphone Warehouse had getting the Orange one in it, anyway - lots of jamming in with a plastic card - it's not a route I fancy taking, in case I end up with an altogether non-functioning phone.
On the Samsung website when I enter my model number i5800 - NOT i5801 - to select "available downloads" I am sent to the page I mention in my post above. Nowhere is i5801 mentioned on the list of firmware or software, nor, on the Samsung website, is there any mention of Orange.
My query is also regarding Samsung Kies - and, having uninstalled and reinstalled the software to my computer now, also, rather than just upgrading it - I am puzzled as to why my computer still shows v.2.0.0.11044_11 when the "upgrade/new version" I download from the site says it should be v.2.0.0.11044_11_3. The _3 version of the software is dated 03 May 2011 on the website and that is the one I am attempting to download; in addition a new manual is shown for Froyo (UK and Cyprus) for the i5800.
I'm sure I'm not the only one totally confused by whether there is an update or not. I have the phone, I'm on the network for which people are saying there is an update: yet I don't have an update.