Hi Mark!
Sorry, I can't answer your question, but if you're wondering about these kinds of things then you would just love the book
The Experiment by John Darnton. It's fiction, but he did his research, including extensive interviews with leading scientists in the field, including one of the lead researchers on the Dolly team *before* Dolly was announced. It's a good read and it's chock full of interesting tidbits, particularly about cloning and telomeres.