The New Seekers were the reformation of the The Seekers, who I consider the greatest folk band of all time.
The Seekers were all-Australian, and are still revered, and still active, with the original lineup, in Australia. They featured the best guitar lineup in all of folk music, with Keith Potger's 12 string and Bruce Woodley's rhythm, and Judith Durham singing lead vocals always looking like she wasn't trying very hard.
The Seekers produced what I consider the greatest single ever in the history of folk music in 1965 (The Brits agreed - it was the #1 single in the UK that year). You can't play this song loud enough, and the band seemed to understand that - they're practically shouting on the studio versions. It was written by Dusty Springfield's brother Tom for the Seekers and was a #4 in the US and of course #1 in Australia as well.
Here it is... crank it up: