Anyone know about how/costs bringing a dog from Australia?

Hi, not sure if this is in the right section or not. Does anyone know about the cost and quarantine laws for a dog coming from Australia to the UK. We are hoping to move to Austarlia in a couple of years time when my eldest finishes her A levels and have found loads of info on taking the dog with us there but can't find any about bringing her back if we decided to come back (only if kids can't settle).
Thanks for any help.