As much as that incident led to a tragic loss of life, it clearly had an effect on wanna-be terrorists in the UK. At least, there were reports that when one of the would-be second-wave Underground bombers was apprehended, he was very vocal about not wanting to be shot by the arresting officers. He might not have originally believed that Police would shoot to kill in the UK, but he had no doubt after that incident. Perhaps this incident will have a salutary effect, too...