London: British MPs have been told the Australian bushfire disaster is a "wake-up call for the world" ahead of a parliamentary debate on the crisis that could place fresh international scrutiny on the Morrison government's climate change policies.

In a statement to the House of Commons on Tuesday, Speaker Lindsay Hoyle said the United Kingdom was shocked by the blazes "laying waste to so much".

Speaker of the House of Commons Lindsay Hoyle said the magnitude of the disaster "should shock us all". Credit:AP

Meanwhile, Prince Charles has recorded a video on behalf of himself and Camilla the Duchess of Cornwall in which he said the "appalling infernos" were "not to be believed".

"Both of us have been in despair at the last several weeks watching this appalling horror unfolding in Australia and witnessing so much of what you're having to go through from this distance," the heir to the throne said in the most expansive comments on the catastrophe yet from a member of the royal family.