The role of Porgy, the crippled beggar in Porgy and Bess, has always been hard to pull off as he changes from grump to lover, but a Cape Town Opera version opening in Britain this month sets him a Herculean challenge:

To get back his Bess, Porgy has to make his way from Soweto to New York a goat cart.

No problem, though, for Ntobeko Rwango, the opera company's 31-year-old bass baritone who alternately will sing the role of Porgy and his arch nemesis, the evil Crown, in George Gershwin's depiction of the squalid, murderous yet loving life in Catfish Row, South Carolina, transported to South Africa.

It's a story of courage, it's a story that shows anything is possible, Rwango told Reuters by phone from South Africa.

He and the rest of the company were rehearsing for the opening at the Wales Millennium Center in Cardiff on October 21, followed by performances in London and Edinburgh.

This is not the first time the Cape Town Opera has regaled Europe with its take on the 1935 American opera classic with its treasure trove of tunes including Summertime, Red Headed Woman and It Ain't Necessarily So.

But the all-new production, having its premiere in Britain, moves the opera from the outskirts of Charleston to Soweto. It replaces the black fishing village's shacks with a building that has been hijacked by black squatters and changes the setting from the segregated American south to apartheid South Africa.

We've said, 'Let's imagine for a moment that this is 1960s South Africa and let's imagine that the police have this kind of power over us', Michael Williams, the Cape Town Opera's white general manager, said.

Let's imagine that we've hijacked a building and we're living here and of course it gives the work a different edge.

Lyrics are lyrics, though, and after Sportin' Life spirits Bess off to New York, where he can live the high life while she walks the streets, Porgy still ends the opera looking for her.

That makes Porgy's quest even more monumental -- he's leaving from Soweto to New York and that's a helluva journey, Williams said with a laugh, adding that despite some anachronisms, the transfer to South Africa works well.

I think we're entitled to do that, there's nothing wrong with it and I think it adds an interesting take on it, said Williams, who has been with the company since apartheid was abolished and has seen it survive -- and even thrive -- under the rainbow coalition of multiracial South Africa.

And what work better to embody multiracial and multiculturalism than a black opera, full of soul, gospel and jazz tunes, written by two Jewish brothers, the composer George Gershwin and his lyricist brother Ira, with a libretto by DuBose Heyward, who wrote the book on which the opera is based?

For this opera, and its music, it doesn't matter if you're white or black or yellow, said Ntobeko, one of the Cape Town Opera's lead singers. Anyone can relate to 'Porgy and Bess'.