BE 2010 Not removing VMWARE snapshots from VCenter

Hi there, As the title states, we can see on the VCenter server that BE2010 is not removing the snapshots of the VM's after it has completed a backup, providing some backups do fail at times and some are a good run, however the backlog is becoming big and taking allot of storage space.

Please advise on some simple steps to check to ensure that BE2010 is infact removing the snapshots or "ghost" snapshots from the Vcenter

We are running W2K8 R2 with BE2010 SP3