Punk legend John Lydon has defended his decision to appear in a much-maligned U.K. advert for butter, insisting he was proud to boost the image of a British brand.

We don't seem to believe in ourselves as a country any more. And I found great empathy with that

The former Sex Pistols frontman stunned fans when he signed up to fronta TV commercial for Country Life Butter in his native Britain, and came under fire for apparently selling out.

The commercial reportedly netted him a cool $8 million (£5 million), which he claimed he used to fund Public Image Ltd.'s reunion tour in 2009.

But despite the criticism, Lydon is adamant he's proud to be associatedwith a completely British company.

He tells The Sun, "The advert was for a British product. All Britain. Fantastic. We don't seem to believe in ourselves as a country any more. And I found great empathy with that.

"Plus it was the most maddest thing to consider doing. I thought it wasvery anarchic of the dairy company to want to attach themselves to me. And they treated me with the utmost respect and I love them forever as it allowed me to set up my record label and put out this record".