As requested, please find info below
May 9 19:00:11 Johns-iMac com.apple.backupd[2862]: Starting standard backup
May 9 19:00:11 Johns-iMac com.apple.backupd[2862]: Backing up to: /Volumes/Backup/Backups.backupdb
May 9 19:02:20 Johns-iMac com.apple.backupd[2862]: 899.9 MB required (including padding), 1.39 TB available
May 9 19:17:54 Johns-iMac com.apple.backupd[2862]: Copied 33187 files (27.6 MB) from volume Home.
May 9 19:18:58 Johns-iMac com.apple.backupd[2862]: 874.1 MB required (including padding), 1.39 TB available
May 9 19:34:44 Johns-iMac com.apple.backupd[2862]: Copied 32438 files (2.5 MB) from volume Home.
May 9 19:50:43 Johns-iMac com.apple.backupd[2862]: Starting post-backup thinning
May 9 20:06:53 Johns-iMac com.apple.backupd[2862]: Deleted /Volumes/Backup/Backups.backupdb/John’s iMac/2012-05-07-031234 (16.9 MB)
May 9 20:06:53 Johns-iMac com.apple.backupd[2862]: Post-back up thinning complete: 1 expired backups removed
May 9 20:06:54 Johns-iMac com.apple.backupd[2862]: Backup completed successfully.
May 9 21:00:11 Johns-iMac com.apple.backupd[2935]: Starting standard backup
May 9 21:00:11 Johns-iMac com.apple.backupd[2935]: Backing up to: /Volumes/Backup/Backups.backupdb
May 9 21:02:25 Johns-iMac com.apple.backupd[2935]: 927.6 MB required (including padding), 1.39 TB available
May 9 21:18:05 Johns-iMac com.apple.backupd[2935]: Copied 34126 files (45.8 MB) from volume Home.
May 9 21:19:22 Johns-iMac com.apple.backupd[2935]: 889.7 MB required (including padding), 1.39 TB available
May 9 21:35:16 Johns-iMac com.apple.backupd[2935]: Copied 32827 files (14.2 MB) from volume Home.
May 9 21:51:26 Johns-iMac com.apple.backupd[2935]: Starting post-backup thinning
May 9 22:07:51 Johns-iMac com.apple.backupd[2935]: Deleted /Volumes/Backup/Backups.backupdb/John’s iMac/2012-05-08-202735 (34.4 MB)
May 9 22:07:51 Johns-iMac com.apple.backupd[2935]: Post-back up thinning complete: 1 expired backups removed
May 9 22:07:51 Johns-iMac com.apple.backupd[2935]: Backup completed successfully.
Thank you for your help.
John