Thanks for that Jimi, thanks for taking the time to go through the circuit logic, not easy to follow!
I lay in bed last night with this circuit torturing me, i was sure there was a very simple circuit that i was overlooking, then it hit me like a bomb going off and i slept like a baby after that!
So my new design (even though the 4 relay 2 switch one works perfectly) uses NO relays at all.... sometimes i overthink things when there really is no need, the logic in this circuit is so simple a child could follow it.
Even though this one uses two more switches i like it because there are no relays.
Jimi i can't display Reverse on the 7 segment unit, the digits are pre-programmed so there is no "R", but the display will go blank using this circuit so that will have to do, also the Evora cluster has a reverse warning buzzer that you just trigger via the reverse light switch.
Hopefully these circuits will help someone else make their own display.