Hi, i have been living in Australia for 11 years moved here when i was 15, i have a 4 year old son born here in Australia. We are moving back to UK in 5 weeks and through the packing and cleanup i cannot find his british passport anywhere (was never used). He has an Australian passport but i am unsure on entering UK with his Aussie passport and i don't have enought time to get him a new british one. Will they only grant him 6 months stay in UK? Or is he fine due to automatically being a british citizen through decent. I have been reading up and getting different answers.