Science Avenger has some good stuff on Bethell vs Derbyshire:
The IDers have proposed the designer hypothesis, thus the onus is on them to devise falsifiable experiments to support that position. It has long been the position of scientists and philosophers who have examined the ID claims that no such experiments are possible, because the Designer could do anything at any time for any reason. This is why ID fails to qualify as science.
Have a look at the whole post, it’s a good one.