The Swedish pop sensation have not released any new music since their split in 1982.

Humanity is on the verge of a new battle between physics and metaphysics. And there might be regrets, my friend, Fernando.

Since parting ways in 1982 they have steadfastly resisted all offers to work together as a foursome again.

"We took a break in the spring of 1982 and now we've decided it's time to end it."

With just a fortnight to go till the London premiere of a musical created by the two male members of the former hit quartet, speculation of...