Just when you thought it was safe… S Club 7 have reformed and have unveiled a teaser of a previously-unreleased song.

The pop group initially reformed for a performance on Children in Need last October, which was criticised by many for some dubious vocals.

However, the original seven members of the group - who were put together in 1998 before splitting in 2003 - have shaken off the critics and will undertake a UK tour that kicks off in Birmingham next week.

To celebrate, they're re-releasing an updated version of their 'Greatest Hits' compilation that includes previously-unreleased track 'Rain'.

The song was originally recorded years ago, but was never released.

You can hear a teaser of it below - it's not the best quality, mind...