Reg Help

Just uploading some pics to Airliners.net, and I’ve got a photo of a Cessna CitationJet (I believe) from LHR. The REG is CS-DFU, but I can’t find anything about it online, so I have no idea who it belongs to etc.

Was wondering if anyone here knows or might be able to find something out for me – tried a google search but had little of any relevance. Attached the pic…

TIA,

Dan