The singer and his bandmates Bobby G, Cheryl Baker and Jay Aston scooped the prestigious trophy in 1981 with their catchy, chart-topping hit Making Your Mind Up.
But he is adamant it's time Britain bowed out of the annual pop competition for good, accusing judges of persecuting the U.K. for political reasons.
Nolan tells Wenn, "In my opinion, I think the U.K. should pull out of it. I really do, I just don't see the point in doing it. If they enjoy doing it and they want to put someone in every year so they're in it every year, then yeah, go ahead. But I think the time comes when people don't want to do it.
"With us, we did it and it was really exciting. It was all down to the jury and you got a kick out of it. But now I think they should call it the Eurovision Entertainment Contest because the songs that win it are just terrible. The U.K. will never win it. I just don't think we ever will win it again. I don't think so, I really don't."
Nolan blames the voting system for warping Eurovision into a politics showdown, and fears 1980s star Bonnie Tyler, who is flying the flag for the U.K. this year (13), has no hope of walking away with the crown.
He adds, "She's not going to win. It's nothing to do with Bonnie at all, Bonnie's an excellent singer. It's just that with this Eurovision thing now, it's all political."
The U.K. has triumphed at Eurovision five times since it was launched in 1956, last taking home the trophy in 1997. This year's (13) competition takes place on Saturday (18May13).