Dr. Sheila Willis:

As I mentioned in my written statement we have visits from defence scientists on average twice a month. Defence teams use their opportunity to review the cases about twice a month. In terms of how many times our cases have been rebutted, in which the Deputy presumably means our evidence was found to be at variance with what they found - I am not aware of any. Arguments certainly arise on different occasions, there is a particularly contentious one at the moment, but I cannot think of any example of where our evidence has been found wanting.