So if anyone out there can see what update I'm on it would be gratefully received.
You won't find anything clearly stating the car has RCn, you have to infer it from the build state. Your screen shot is exactly the same as for my car, which has RC5.
But it seems as if the update from RC4 to RC5 does not change the build state, so your car could have either one of those. If that's how it was delivered to you then that's good because it confirms that the cars are being delivered with updates already installed.
If you're not experiencing any of the issues reported in this thread, I shouldn't worry any further; my earlier comments were really a reaction to people with relatively new cars reporting the Trip A problem and having to take their cars back, suggesting that the updates were not being applied before delivery.