Thanks guys!
I don't feel there was any genuine attempt to keep me in the fold, they did mention a few options but none of them came to anything. I was/am genuinely gutted to be leaving the brand after having a 220d, 250 and then the 300h. I think Lexus accepted that they couldn't offer me another because they couldn't guarantee it wouldn't have the same faults and they have no idea when the situation would be resolved.
That said Lexus Bolton were great and we left things on good terms.
The problems were really infuriating me and it was highlighted when I borrowed my sisters Renault Captur and her entertainment system worked fine on a car that was a fraction of the cost.