Thanks for the response.
I have just checked the data partitions on each of the old versions. The old version of vCOPS is currently using 120GB of space, and the Analytics VM disk is sized by default to 200GB. The old version of CapIQ is using 16GB of space, and the UI VM disk is sized by default to 120GB.
Going on the 110% of current data, there shouild be enough space currently allocated. I will add another disk to the Analytics VM, as I'm sure that future growth will warrant that. I will let you know the result.
Cheers