Keyboard player and guitarist Hensley co-wrote many of the band's early hits and was a member from 1969 to 1980, while drummer Kerslake performed with the rock stalwarts from 1971 to 1979 and from 1981 to 2007.

They'll join founder Mick Box, singer Bernie Shaw and the current Heep line-up for the show at the Moscow Circus on 15 October (15).

Box tells WENN, "Uriah Heep is now in its 45th year... and so much has changed in the world since we began in the 1970s, however the music that we created, and still do to this day, has proved to be timeless.

"To celebrate, the present Uriah Heep line up of Mick Box, Phil Lanzon, Bernie Shaw, Russell Gilbrook and Dave Rimmer, are welcoming back into the fold, former members Ken Hensley and Lee Kerslake, to be part of an exciting one off event held at the Crocus Hall in Moscow, Russia.

"This will be a night full of classic Heep music, a night full of emotion, and a very, very special night for the fans!"

Despite the fact that Uriah Heep are a British band, with a Canadian singer, they've tasted much of their success in the past three decades in Russia and the former Soviet Union.