Anthony Albanese has held talks with King Charles III during his visit to the UK, as the prime minister defends an upcoming address to Britain's Labour Party conference.

The prime minister met with the monarch at Balmoral Castle after flying into Scotland on Saturday (UK time).

Mr Albanese said the reception with the King, his fourth such audience with him, was "delightful".

"He's warm and engaging. It was very good of him to honour Australia with the invitation to come here to Balmoral Castle for a one-on-one meeting," he told Sky News on Sunday.

"His Majesty is ... someone who is interested in Australia.

"He's someone who I take a great deal of benefit from his insights into issues and it's always good to have these one-on-one discussions with him."

It was the first time an Austral

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