About half their bus work was commercial and all of that was effectively directly competing with either TrentBarton or Arriva, the other half was tendered to Derbyshire (they hadn't lost much work that recently). DCC have been on the ball through this and all tendered services had replacement operators lined up for Monday within hours of Yourbus coming off the road.
From Yorkshire Traction Yahoo Group
Derbyshire-based YourBus have ceased operating as of this morning.
They were due to loose several tenders to Stagecoach at the end of the
month - the 216 (Matlock - Bonsall) and 217 (Matlock - Chatsworth), plus
interworked school services 169 & 470 were awarded to Stagecoach Yorkshire
(to be operated by Chesterfield depot) and I understand others in the
Alfreton area were awarded to Stagecoach East Midlands (Mansfield).