Yes Steve, there is a Garmin GNS500 in the centre pedestal, which also feeds the MFD in the main panel.
Fuel depends really, but it's anywhere from £0.70 - 1.10 per litre (I'll let you do the conversions!)
The aircraft has been here for a few years now and with the same owners since it came from the US I believe. I have recently taken over from their previous pilot, who has moved onto other things. It's certainly a step up in performance from my last job, which was a C421-C (also a lovely aircraft in my opinion - won't have a bad word said about them!).
I've attached a couple of photos from recent flights. The first is just a random night shot over the UK from a month or so ago. The second was a sample of the foggy weather we've enjoyed here over the last week, and the third was taken during a transit through the London City Zone, which was good fun.