Def Leppard/Last In Line guitarist Vivian Campbell has confirmed the full reunion of Riverdogs, the band he first joined pre-Def Leppard 26 years ago.

Campbell joined the quartet in 1990, after being asked to produce their first demos. Although they recorded one early album with Campbell, he left to join play with Foreigner's Lou Gramm, then joined Def Leppard.

A brief live Riverdogs reunion in 2003 led to some demos that were later polished for the World Gone Mad release of 2011, but the band – Campbell (guitars), Rob Lamothe (vocals, guitars), Nick Brophy (bass, vocals) and Marc Danzeisen (drums) – are now writing new songs for a full fifth album, due in early 2017 via Frontiers Records.

A new video message from the band taken can be seen below.

Campbell released an album with fellow surviving members of Ronnie James Dio's band earlier in 2016, as Last In Line, but although Heavy Crown was well-received, the sudden death of bassist Jimmy Bain put paid to any long-term plans. Now, Riverdogs will be Campbell's focus alongside his continuing work with Def Leppard.

Read Gibson.com's interview with Vivian Campbell from 2015.