How do i differentiate between the british and australian accent?

i know it may be obvious to most people but sometimes i get confused. we rarely get british or australian channels here and most movies and channels are in american accent. sometimes when i hear an australian accent, i know it is definitely australian. but when i hear british accents, i got confused between the two. is this normal, i duno. i'm asian by the way. is there any easy way to distinguish between the two?