Done it so many times that I couldn't believe Win8 was a risk. Got complacent I guess. Up till now so many PC's and laptops with 500 Gb HDD's are split 50/50 so data can be stored on the "D" drive. This Lenovo is one partition (Apart from the various minute partitions outlined above which amount to 1 GB)
I think it's going back to PCW tomorrow and see if their techies can give me a Win8 recovery media. Otherwise a straight replacement.