Aust ready for any Brexit result: minister

Australia is prepared for any possible outcome on Brexit, according to Trade Minister Simon Birmingham.

As UK Prime Minister Theresa May defends her draft Brexit deal against fierce critics, Senator Birmingham says Australia has put measures in place to deal with however things play out.

"Ours is very much a belt and braces approach," he told ABC TV on Sunday.

Negotiations are already underway on a new free-trade agreement between Australia and the EU and Australia has established a trade working group with the UK, Senator Birmingham said.

Australia has also been replicating text from some of its market access agreements with the EU, in readiness to deploy them for the UK.

"We could bring those into effect with the UK quite quickly should there be an abrupt, perhaps no-deal Brexit," the trade minister said.

"We are ready for pretty much any possibility that arises."