Gideon Coe sits in for Bob and is joined by Squeeze founder Chris Difford playing live.
BBC Radio 2
American born, Germany based, singer songwriter Marybeth D'Amico joins Bob to play live.
Harper Simon will be performing live versions of tracks from his new album.
Danny and the Champions of the World warm up for festival season by playing in session.
Canada based Welsh guitarist Philip Sayce plays live and previews his new album.