irishinaus

Kids born 2005,and 2007 here. I was born uk 1981

Spouse visa for husband then as mil had gotten Oz citizenship before her kids born

I still want home after 15 years and my eldest son wants to go back too. 

2 kids British born, 2 Aussie born

I always held my British passport. Never traded it in. 

Husband is aus born but was living in uk when we met. His mum lives in aus but British born, his dad British born too.  I am British born. The two Australian born kids have a British citizen mother and both sets of grandparents born in uk.  What type of visas for husband and kids or are the kids British by descent?