I Think I found the remains of the snapshots on our datastore.
For a couple of this servers vmdk files I have the following on the datastore:
servername.vmdk
servername-000002.vmdk (points to date and time of clone task)
When looking at the configuration, it points to the normal .vmdk, so when the clone was cancelled the snapshot files were bypassed and we went straight back to using the unchanged base vmdk's.
If we found this out at the time the problem occurred, was there a way to be able to get the data in the 000002.vmdk files?
Thanks