Had contacted Codemasters about the issue and the only response is a sorry. The disc being for US region , the DLC has to be purchased on an PSN account thats connected to US store / geography .
Now this is ridiculous since the PSN store lets you purchase DLC's and there is no way to check game compatability at that time . There is no notification or warning shown even
Given that customers pay for the DLC's and end up not having a way to use it ( or return it ) its a huge waste of money and time. Codemasters should take this seriously to make sure DLC's work across all game disc's irrespective of location. After all the game and dlc was purchased. They seem to be very casual about this and dont seem to care .